Bitcoin mining.

[Bitcoin]

How To Mine Monero (CPU GPU)|17:56

[Bitcoin]

How to Mine XMR Coin With CPU Mining AMD vs Intel - Zakria ZU -|15:00

[Bitcoin]

How To Mine Monero (XMR) - Monero Mining - NEW Guide 2021 - CPU|6:58

[Bitcoin]

MAKE $1,770 By Mining Bitcoin on Your PC/SMARTPHONE IN 2020!! (PROOF)|8:41

[Bitcoin]

HD 6670 Bitcoin mining.
When you got your first experience with Bitcoin money you may want to try Bitcoin mining on your PC. First of all you need to get configuration information of your PC and check if your hardware capable to run Bitcoin mining fast enough. As you know, CPU mining currently is faster than GPU mining more than 100 times. So it's very important to have really fast video card on-board. NVidia GeForce GPU cards are surprisingly slow in comparison to AMD ATI Radeon HD. It's pointless to run Bitcoin mining on NVidia cards. Here list of most effective cards to run mining:
Best performance/cost ratio have ATI/AMD Radeon HD 5xxx series cards:
140 MHash/s - 90W Radeon HD 5770.
190 MHash/s - 110W Radeon HD 5830.
260 MHash/s - 175W Radeon HD 5850.
290 MHash/s - 151W Radeon HD 5870.
380 MHash/s - 188W Radeon HD 5970.
640 MHash/s - 294W.
AMD Radeon HD6xxx series cards are more expensive and got lower performance/cost ratio:
110 MHash/s - 50W Radeon HD 6790.
190 MHash/s - 150W Radeon HD 6850.
210 MHash/s - 127W Radeon HD 6870.
280 MHash/s - 151W Radeon HD 6950.
310 MHash/s - 200W Radeon HD 6970.
370 MHash/s - 250W Radeon HD 6990.
690 Mhash/s - 375W.
Full hardware comparison list for Bitcoin mining with all GPU and CPU performance data you can find on wiki.

[Bitcoin]

This is a very specific article meant to target a very small subset of geeks out there. Sure, there are many of us geeks, and a large number have heard of this craze the last few years called Bitcoin. After Bitcoin became popular, like tv news popular, a number of crypto-coin spinoffs have surfaced. I'm not going to go into the merits (or scams) of the various altcoins out there, but a very popular one called Litecoin is what got me started in the mining hobby.
As anyone getting into mining learns quickly, cpu mining is not very popular because quite frankly it sucks. Using your GPU is where it is at for the home user, yielding easily 10 times the speeds of the CPU. Bitcoin is now mined only using dedicated miners, so if you are planning to mine Bitcoin this late in the game, don't bother. However, there appears to be some speculative profit in mining other scrypt-based coins, like Litecoin. If you decide to mine with your GPU, use whatever you have until you truly know what you are doing. It is easy to think the whole thing is a slam dunk money fest, and done right, it might be, but don't spend thousands of dollars up front for naught. For example, ATI video cards are much better at mining then nvidia, which is why they are sold out everywhere!
If you can get your hands on an ATI video card, XFX is probably the brand you will land, because they suck, haha. I have a XFX AMD HD 7970 that I got for gaming for around $300 a little while ago. I got lucky because since as of today (a day before Christmas), they are moving for $450+ on eBay. The problem with this particular brand is two fold, they run hot as hell, and they seemed crippled when you start mining, getting half the speeds of other brands with the same model of chip.
Using the default cgminer 3.7.2, I pulled a mere 450 KH/s with:
After a lot of research on the Internet, it seems other people with 7970 cards were getting 700+ KH/s. I was not pleased with a mere 450 KH/s. After a ton of command line tweaking, I was able to get into the 530 KH/s area with:
cgminer -I 13 -g 2 -w 256 -thread-concurrency 8192.
Still not pleased, being I was getting less than 700, a lot of Googling lead me to someone who swapped the XFX firmware bios on the card with a Gigabyte version. Flashing the firmware can be a dangerous proposition as it can lead you to brick your card, but a majority of the time, you can just boot up on another video card (hope you have one handy) and flash back your old bios. So be sure to back it up using GPU-Z and do your homework.
I downloaded the Gigabyte bios after backing up my current XFX bios to a safe place. I can't stress enough to backup your bios! There are a lot of writeups to boot to a dos disk, but I was lazy and used the ATIWinFlash tool to avoid all of that. A little warning though, it failed the first time I tried to flash, but all I had to do was hit the flash button again and voila, success!
After rebooting, I was now getting right around 700 KH/s with the following:
cgminer -I 13 -g 2 -w 256 -thread-concurrency 8128 -gpu-powertune 20 -gpu-engine 1040 -gpu-memclock 1825.
For most people, they'd be done now, but I wanted to run this GPU in my ESXi farm. Why? Because I already run an ESXi farm and don't want to leave a 300W gaming rig running all day. Mining is already a gamble. If you can remove most of the power costs, it is only profit left!
In vSphere 5.5, VMware really improved the passthrough capabilities of ESXi. They still suck, but one thing added was GPU support for View. I tried very hard to get my nvidia GTX 470 working with ESXi, and failed. Once again, ATI shines and I'm able to get it working with the following tips:
Make sure you are not using the video card as the ESXi Host's boot device. Change it in the bios to boot to another video card (like the onboard one) or this whole thing will not work. Enable passthrough for all the devices that ESXi detects. In my case, there is a video and audio driver. Load the correct driver before setting up passthrough.
After three reboots, I was able to see the AMD HD 7970 in the device manager. However, when I used the same cgminer commands:
I began getting a crappy 500 KH/s again. I loaded a GPU-Z, and noticed that my VM could not see memory clock speeds, core clock speeds, or even GPU temperature. This makes sense from a virtualization point of view; however, it means the VM is ignoring cgminer's overclock settings.
In my searching, I stumbled across an ATI bios editor. With this, I'm able to download the firmware from my card (using GPU-Z) and then edit the base core clock and memory speeds! If this whole topic hasn't scared you yet, and you are still feeling brave, do double check you have those firmware backups handy. Using the tool, I change my gpu core clock speed to 1040 and the memory clock speed to 1825.
And there you have it,
700 KH/s on an XFX AMD HD 7970 graphics card, in an ESXi virtual machine!
Radeon GPUs in Demand as Litecoin Mining Difficulty Increases.
Nermin Hajdarbegovic.
Bitcoin mining on a standard GPU is a thing of the past. Put simply: it's no longer economically viable, given the power consumption of discrete graphics cards and their relatively high price.
ASICs are a no-brainer when it comes to bitcoin, however litecoin is a different story.
Unlike its counterpart, litecoin can still be mined using off-the-shelf hardware, namely via AMD Radeon graphics cards. There aren't that many alternatives, either. There are still no ASIC products for scrypt, litecoin's algorithm, and this will not change for the next few months at least.
It is rumoured that litecoin ASIC systems are being developed by Alpha Technologies, but it will be a few months before they hit the market.
Furthermore, scrypt is a very different beast, as it requires a lot more memory and different ASIC designs. This means that scrypt ASICs could become significantly more expensive than the existing ASIC-based Bitcoin mining solutions.
Are litecoin miners causing a Radeon shortage?
In any case, Radeons are currently the weapon choice for litecoin miners and earlier this week several tech sites reported that litecoin miners are causing a shortage of Radeon graphics cards.
While it is true that some cards in some markets are in short supply, it is very difficult to attribute this to litecoin miners without any concrete data from AMD, its add-in-board (AIB) partners and distributors.
Therefore, it is probably convenient to make such claims, as they cannot be easily disproven.
Litecoin mining is booming, that is a fact. Over the last month or so, the litecoin hash rate has doubled, along with difficulty. It was practically flat in September and October.
However, the rate currently stands at about 90GH/s, up from about 20GH/s in June.
People are clearly buying Radeon cards and using them to mine litecoin, but this isn't necessarily creating a shortage.
According to Jon Peddie Research, the discrete graphics card market is about 14.5 million units per quarter, and AMD's share is roughly 35%, so AMD partners sell about five million Radeon cards each quarter.
The numbers simply don't add up, given the hash performance of AMD's mid-range and high-end cards. In other words, litecoin miners aren't even close to making much of an impact on AMD's overall shipments.
There could be some isolated cases though, namely in the US, but it should also be noted that AMD introduced new flagship graphics cards two months ago.
The company also rebranded previous generation cards and it is offering various game bundles to avoid inventory issues and transition to R9- and R7-series products, many of which are simply rebrands of older HD 7000 series cards. There are no Radeon shortages in Europe.
GPUs still have potential for litecoin mining.
Since litecoin uses different hashing algorithms than bitcoin, with more access to cache memory and memory in general, existing bitcoin ASICs do not tend to offer good results with litecoin.
Unlike SHA-256, scrypt is memory-hungry and this was an intentional effort on the part of litecoin developers to prevent the use of ASIC and FPGA specialised hardware for litecoin mining.
FPGAs could be used, but at this point it isn't clear whether the performance gain would justify the added cost, especially as difficulty and litecoin value increases.
For the time being, Radeon cards are a relatively good choice for hobby litecoin mining. The biggest problem is power consumption.
A single Radeon R9 290X, based on AMD's new Hawaii silicon, can draw up to 250W of power under load, but miners claim it is capable of around 860 KH/s to 900KH/s, depending on the GPU clock and other factors. It costs €499 in Europe, or $549 in the US.
Older cards, based on the Tahiti core, can deliver even an even better price/performance ratio and the same is true of the €399 R9 290.
The most popular mining Radeons are the HD 7950, HD 7970 and R9 280, all of which are based on the old Tahiti core and they are now considered mid-range products.
FPGAs should offer superior performance per watt, but then again they are not as readily available as graphics cards. In fact, litecoin specific FPGAs and ASICs are still not available at all.
Furthermore, it is still unclear how much they will cost once they do appear, as hardware requirements for litecoin and Bitcoin mining differ greatly.
However, it is difficult to talk about profitability at this point, since litecoin value is going up, along with hash difficulty. Since the price is constantly changing, it is up to individual miners to decide whether GPU-based platforms are viable in the long run. At the moment, the answer is yes, but this could change in a matter of weeks.
Reusing old hardware is another option.
Many bitcoin miners who used GPUs are now stuck with old mining rigs, provided they haven't already sold them.
While it is possible to argue that the spike in the litecoin hash rate was caused by miners buying Radeons, it is just as possible that some veteran bitcoin miners have simply found a new use for their old hardware, which has already paid for itself several times over.
It is highly unlikely that all of the miners sold their rigs and are now buying entirely new ones to mine bitcoin.
Oddly enough, some hardware makers are trying to cash in. Last month, ASRock launched two motherboards, designed specifically for mining.
The company's blurb focused on bitcoin, claiming that the boards could help users "make a fortune."
Needless to say, anyone mining bitcoin with a standard x86 processor and a few Radeons on a cheap motherboard would only stand to gain a whopping electricity bill.
However, the motherboards could be interesting for litecoin miners, as they are relatively cheap and can take up to six graphics cards, although five of them will have to use PCIe 2.0 x1 slots.

[Bitcoin]

So why are prices of Radeon cards going up exactly?
Litecoin mining is definitely a factor, but it is also a temporary spike.
To avoid inventory issues, AMD and AMD AIBs don't have a habit of stocking up, hence they are probably unable to cope with the sudden spike in demand.
Graphics cards are shipped in batches on a regular basis, not produced overnight.
AMD orders the silicon from TSMC in Taiwan, PCBs and memory chips come from Taiwan, China and Korea, along with coolers, VRMs and other components, so making sure the supply chain works efficiently is a delicate balancing act.
For many people willing to try litecoin mining, Radeons are the equivalent of a gold shovel in mid-19 th century California.
AMD's supply chain is not designed to cope with a sudden influx of new customers who do not care about upcoming games, custom cooled cards or other stuff that are vital to gamers, AMD's target audience.
Since they feel like they are selling gold shovels, retailers and resellers are acting accordingly, by engaging in price gouging.
Is It Safe To Use Bitcoin?
Is it safe to use Bitcoin? Can you trust a decentralized computer network with your money?
Most people still treat Bitcoin as a mythical pandora box which contains thieves, money launderers, scammers, terrorists, other people of the worst kind.
However, outside the realm myths and fantasy, such statements are entirely false and misleading. Thousands of programmers develop the Bitcoin network every day, and mostly for free in their spare time, as it is an open-source community-driven project standing for personal freedom and financial inclusion. It is not perfect yet, but it gets better every day.
The answer to the question "is it safe to use Bitcoin" is yes, but it also depends on how well can you manage your security.
In its ten years of history, Bitcoin, when used and stored correctly, has proven itself to be a reliable financial instrument when it comes to storing value, secure borderless peer-to-peer money transfers, and accessibility.
The protocol itself is sturdy enough to withhold even the most sophisticated attacks, and most of the bad news surrounding Bitcoin hacks are due to the third-party service providers like centralized exchanges, wallet developers, or private key mismanagement.
Of course, as with every other type of money, there are certain issues Bitcoin users need to know if they want to protect their wealth. These include Bitcoin price volatility, secure storage of cryptocurrency, use of insecure third-party services, and cybersecurity threats like hacking.
At the same time, we could also raise a question whether it is safe to use dollars and other traditional finance tools, as most of the money laundering and other nefarious activities are still conducted using traditional money. The conventional financial systems have proven to be prone to economic bubbles and crises, and the government-backed money tends to significantly devalue over time.
Therefore, it is safe to use Bitcoin, especially if you're willing to take responsibility for protecting your funds on your shoulders. And since the technology is still in development, it requires time and effort to learn how to handle it.
So, how do you safely handle your Bitcoins?
How to secure your Bitcoin?
Storing Bitcoins.
These are the vital steps to ensure that you're following the best Bitcoin security practices:
Rule number one is to take good care of your secret "private key" - the password for accessing and using your Bitcoins. (For more on choosing a wallet, follow this link ). If the private key is secure and no one else can get to it, then your Bitcoins are safe. But keep in mind that if you lose your private key, even you yourself won't be able to access your funds.
Choose a reliable wallet that fits you, as it will act as a bank account to access your funds. They can be stored both online or offline.
Secure Bitcoin hardware wallets by Ledger and Trezor.
Exchanging and spending.
When spending or exchanging your Bitcoins, it's important to choose the most reliable and trustworthy services. If you fall victim to fraud using a traditional bank card, laws and regulations may help you recover any losses. For Bitcoin, such protection is yet to come. Also, remember that payments with Bitcoins are non-repudiable - once you pay, the money's gone. If you make a mistake - say you pay USD 222.2 instead of USD 22.22 or send the Bitcoins to the wrong address - you can only rely on the goodwill of the receiver to get your money back.
Anonymity issues.
You may have heard about the anonymity Bitcoin users enjoy. Well, it's only partly true. While everyone can track any wallet and its content on the network, they can't identify the owner of the wallet. Bitcoin wallets and transactions aren't linked to personal data or identity. But there are alternate ways to find out the owners identity. For example, you may be required to reveal your identity when registering on a cryptocurrency exchange. That way all your transactions from the exchange may be traced back to your wallet. Still, if you need stronger privacy, the TOR browser, and other privacy solutions. There are many privacy-oriented Bitcoin wallets, too, as well as other cryptocurrencies with integrated privacy and anonymity features, such as Dash, Monero and Zcash.
Other Bitcoin risks are somewhat hard to control, but it's still important to know them and follow the latest news since the technology is still in development.
One theoretical risk is a 51% attack on the Bitcoin blockchain. In theory, if a group of Bitcoin miners controlled 51% or more of all the hashing power running the Bitcoin blockchain, they could potentially undo several latest transactions.
In fact, there was a moment, in 2014, when the mining pool Ghash.io came close to obtaining 51% of the whole Bitcoin network. But then some members of the pool voluntary left, decreasing its share and influence. Still, Bitcoin experts believe a "51% attack" is unlikely as its cost would exceed the potential benefits of the attack, and it would do little to no harm for more than 99% of the blockchain users. Such attack can't be used to steal Bitcoins or change older transactions. It affects only the most recent transactions, and the efficiency of the network could be disrupted for a moment, too. Essentially, any 51% attack would last for a short time before being quickly fixed by the Bitcoin community. The biggest damage would be done to the cryptocurrency's image.
Hacking poses a bigger risk when it comes to cryptocurrency exchanges, most of which are not regulated and, as history has shown, are hacked quite regularly.
The threat of a hack of the Bitcoin network may become real once a quantum computer is built, as it would be much more powerful than today's computers. But building it is expected to take years, and ways to withstand such attack is already in the works.
Another key issue to watch are regulations. More and more countries are likely to start introducing Bitcoin laws, which could affect how the cryptocurrency can be bought and spent, its legal and tax implications. Alongside the rules, new regulations may also grant Bitcoin users more rights, protection, and clarity.
In addition to the precautions, make sure to see these ten tips on Bitcoin security. If you follow the most common Bitcoin security rules, you are likely to use Bitcoin in the safest and most secure manner.
After all, Bitcoin itself constitutes the safest money protocol ever built. Nevertheless, there are third-party services and individuals don't use adequate measures to secure themselves. Stay safe!
Have any suggestions about this entry? Let us know.
Bitcoin Scams - How To Stay Safe In The CryptoCurrency World.
Scams have long been part of the day to day lives of human beings. While today's scams are quite a bit more intricate, people have been trying to defraud each other since the beginning of currency as we know it.
In fact, even back in the renaissance days, the shell game was used by con-artists to fool people out of their hard earned money. With Bitcoin being a relatively new currency, yet a widely accepted one, scams revolving around the currency seem to be everywhere.
Scam #1: Bitcoin Ponzi Schemes.
One of the most common scams in the world of Bitcoin at the moment is the Ponzi Scheme. Essentially, the con-artists grab your interest by promising you high interest rates on deposits made.
As the nature of the Ponzi Scheme would tell you, those who make their investments early are paid out using the dollars from those that come in later.
This lasts for some time. However, must come to an end at some point. When there's not enough new people signing up to pay out on older investments, the scam falls apart, and those who took part start to realize losses.

[Bitcoin]

Scam #2: Bitcoin Wallet Scams.
One of the factors that makes bitcoin an interesting currency for many is anonymity when making purchases. This anonymity is generally provided through Bitcoin wallets. Essentially, these scammers tell you that their program is the safest and easiest way to transfer Bitcoin anonymously.
The wallet will work perfectly for days, weeks or even months. However, at some point, he con-artist behind the scenes will transfer the bitcoin out of your wallet and into their own. So, when choosing a Bitcoin Wallet provider, make sure that you do your research!
Scam #3: Bitcoin Exchange Scams.
There are several Bitcoin exchanges out there. These exchanges simply sell Bitcoin at the current market rate. However, when looking for a Bitcoin exchange, make sure to do your research. Some exchanges will grab your interest by charging incredibly low fees on credit card processing (an area where exchanges realize their profits).
When your credit card is processed, you receive nothing. No Bitcoin, no refund, the money is gone. One great thing to keep in mind here is that if the fees sound too good to be true, they probably are!
Scam #4: Bitcoin mining Investment Scams.
Bitcoin mining is a process that involves incredibly high level equations. These equations are designed to validate transactions and provide security for the public ledger, something known as the blockchain. However, in order to mine bitcoin, you generally need extremely powerful and expensive computer equipment.
As a result, many people invest in the equipment for these mines, earning returns in the long run as more Bitcoin is mined. Unfortunately however, there are mining investment scams that will take your money, not to purchase equipment, but simply to realize a product. At the end of the day, the investment was never real, and your money is gone.
So, when thinking of investing in Bitcoin cloud mining, make sure that you do your research on the investments you make.
Scam #5: Bitcoin Phishing Scams.
Finally, many con-artists have been sending emails to people letting them know that they have been given or awarded Bitcoins. However, in order to accept the gift or reward, they will need to log into to their wallet using the link in the email. However, when the user logs in, the information is stolen, giving the con-artists full access to the user's wallet.
While there are quite a few scams in the world of Bitcoin, you don't have to become a victim. At the end of the day, you can avoid most scams by simply being aware of them. With that said, if you're involved or want to get involved in the Bitcoin movement, keep an eye out for the scams above.
Mining bitcoin cz port.
This is a high performance stratum pool for BitcoinZ (BTCZ) mining. Pool Fee: 1%
BitcoinZ (BTCZ) Stratum ports:
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Compatible GPU Miner Software.
Download one of these miners for your GPU (NVIDIA or AMD): EWBF Cuda Equihash Miner (NVIDIA) - Windows, Linux lolMiner (AMD) - Windows, Linux GMiner CUDA Equihash Miner (NVIDIA) - Windows, Linux Funakoshi Equihash Cuda Miner (NVIDIA) - Windows, Linux Bminer (NVIDIA) - Windows, Linux.
It's recommended to set your virtual memory to at least 16384 MB (16 GB): Windows | Ubuntu (Linux)
Running A Full Node.
Support the Bitcoin network by running your own full node.
What Is A Full Node?
A full node is a program that fully validates transactions and blocks. Almost all full nodes also help the network by accepting transactions and blocks from other full nodes, validating those transactions and blocks, and then relaying them to further full nodes.
Most full nodes also serve lightweight clients by allowing them to transmit their transactions to the network and by notifying them when a transaction affects their wallet. If not enough nodes perform this function, clients won't be able to connect through the peer-to-peer network--they'll have to use centralized services instead.
Many people and organizations volunteer to run full nodes using spare computing and bandwidth resources--but more volunteers are needed to allow Bitcoin to continue to grow. This document describes how you can help and what helping will cost you.
Costs And Warnings.
Running a Bitcoin full node comes with certain costs and can expose you to certain risks. This section will explain those costs and risks so you can decide whether you're able to help the network.
Special Cases.
Miners, businesses, and privacy-conscious users rely on particular behavior from the full nodes they use, so they will often run their own full nodes and take special safety precautions. This document does not cover those precautions--it only describes running a full node to help support the Bitcoin network in general.
Please seek out assistance in the community if you need help setting up your full node correctly to handle high-value and privacy-sensitive tasks. Do your own diligence to ensure who you get help from is ethical, reputable and qualified to assist you.
Secure Your Wallet.
It's possible and safe to run a full node to support the network and use its wallet to store your bitcoins, but you must take the same precautions you would when using any Bitcoin wallet. Please see the securing your wallet page for more information.
Minimum Requirements.
Bitcoin Core full nodes have certain requirements. If you try running a node on weak hardware, it may work--but you'll likely spend more time dealing with issues. If you can meet the following requirements, you'll have an easy-to-use node.
Desktop or laptop hardware running recent versions of Windows, Mac OS X, or Linux.
350 gigabytes of free disk space, accessible at a minimum read/write speed of 100 MB/s.
2 gigabytes of memory (RAM)
A broadband Internet connection with upload speeds of at least 400 kilobits (50 kilobytes) per second.
An unmetered connection, a connection with high upload limits, or a connection you regularly monitor to ensure it doesn't exceed its upload limits. It's common for full nodes on high-speed connections to use 200 gigabytes upload or more a month. Download usage is around 20 gigabytes a month, plus around an additional 340 gigabytes the first time you start your node.
6 hours a day that your full node can be left running. (You can do other things with your computer while running a full node.) More hours would be better, and best of all would be if you can run your node continuously.
Note: many operating systems today (Windows, Mac, and Linux) enter a low-power mode after the screensaver activates, slowing or halting network traffic. This is often the default setting on laptops and on all Mac OS X laptops and desktops. Check your screensaver settings and disable automatic "sleep" or "suspend" options to ensure you support the network whenever your computer is running.
Bandwidth limits : Some Internet plans will charge an additional amount for any excess upload bandwidth used that isn't included in the plan. Worse, some providers may terminate your connection without warning because of overuse. We advise that you check whether your Internet connection is subjected to such limitations and monitor your bandwidth use so that you can stop Bitcoin Core before you reach your upload limit.
Anti-virus: Several people have placed parts of known computer viruses in the Bitcoin block chain. This block chain data can't infect your computer, but some anti-virus programs quarantine the data anyway, making it more difficult to run Bitcoin Core. This problem mostly affects computers running Windows.
Initial Block Download(IBD)
Initial block download refers to the process where nodes synchronize themselves to the network by downloading blocks that are new to them. This will happen when a node is far behind the tip of the best block chain. In the process of IBD, a node does not accept incoming transactions nor request mempool transactions.
If you are trying to set up a new node following the instructions below, you will go through the IBD process at the first run, and it may take a considerable amount of time since a new node has to download the entire block chain (which is roughly 340 gigabytes now). During the download, there could be a high usage for the network and CPU (since the node has to verify the blocks downloaded), and the client will take up an increasing amount of storage space (reduce storage provides more details on reducing storage).
Before the node finishes IBD, you will not be able to see a new transaction related to your account until the client has caught up to the block containing that transaction. So your wallet may not count new payments/spendings into the balance.
If you are using Bitcoin Core GUI, you can monitor the progress of IBD in the status bar (left bottom corner).

[Bitcoin]

Litecoin Mining Explained|5:04

[Bitcoin]

Litecoin Mining - How to Mine Litecoin Using an Nvidia GPU [Support Segwit] [ccMiner 1.8.3] [2017]|7:10

[Bitcoin]

MONERO XMR Mining is more PROFITABLE... for now|10:57

[Bitcoin]

How To Mine Monero (XMR) Coin With Your GPU Rig - Zakria ZU -|15:43

[Bitcoin]

Linux Instructions.
The following instructions describe installing Bitcoin Core using tools available in most mainstream Linux distributions. We assume you use a Bourne-like shell such as bash .
Using any computer, go to the Bitcoin Core download page and verify you have made a secure connection to the server.
In the "Linux (tgz)" section of the Download page, choose the appropriate file for your Linux install (either 32-bit or 64-bit) and download the file. If necessary, move the file to the computer you want to use to run Bitcoin Core.
Optional: Verify the release signatures.
If you know how to use PGP, you should also click the Verify Release Signatures link on the download page to download a signed list of SHA256 file hashes. The 0.11 and later releases are signed by Wladimir J. van der Laan's releases key with the fingerprint:
Earlier releases were signed by Wladimir J. van der Laan's regular key. That key's fingerprint is:
Even earlier releases were signed by Gavin Andresen's key. His primary key's fingerprint is:
You should verify these keys belong to their owners using the web of trust or other trustworthy means. Then use PGP to verify the signature on the release signatures file. Finally, use PGP or another utility to compute the SHA256 hash of the archive you downloaded, and ensure the computed hash matches the hash listed in the verified release signatures file.
If you aren't already logged into the computer you want to install Bitcoin on, login now. Make sure you use an account that can use su or sudo to install software into directories owned by the root user.
If you logged in graphically, start a terminal. If you logged in another way, we will assume you're already in a shell.
Locate the file you downloaded and extract it using the tar command followed by the argument xzf followed by the file name. The argument xzf means eXtract the gZipped tar archive File. For example, for a 64-bit tar archive in your current directory, the command is:
This will create the directory bitcoin-0.20.1 within your current working directory. We will install the contents of its bin subdirectory into the /usr/local/bin directory using the the install command. The install command is part of the GNU coreutils available on nearly every Linux distribution, and the /usr/local/bin directory is a standard location for self-installed executables (you may edit the commands below to use a different location).
If you use sudo to run commands as root, use the following command line:
If you use su to run commands as root, use the following command line:
To continue, choose one of the following options.
To use Bitcoin Core Graphical User Interface (GUI), proceed to the Bitcoin Core GUI section below.
To use the Bitcoin Core daemon (bitcoind), which is useful for programmers and advanced users, proceed to the Bitcoin Core Daemon section below.
To use both the GUI and the daemon, read both the GUI instructions and the daemon instructions. Note that you can't run both the GUI and the daemon at the same time using the same configuration directory.
Bitcoin Core GUI.
In order to use Bitcoin Core GUI, you will need several libraries installed. All of them should be available in all major recently-released Linux distributions, but they may not be installed on your computer yet. To determine whether you're missing any libraries, open a terminal (if you haven't already) and run the command /usr/local/bin/bitcoin-qt to start Bitcoin Core GUI.
If all the required libraries are installed, Bitcoin Core will start. If a required library is missing, an error message similar to the following message will be displayed:
Search your distribution's package database for the missing file missing and install package containing that file. Then re-run /usr/local/bin/bitcoin-qt to see if it's missing another file. Repeat until Bitcoin Core GUI starts.
You will be prompted to choose a directory to store the Bitcoin block chain and your wallet. Unless you have a separate partition or drive you want to use, click Ok to use the default.
Bitcoin Core GUI will begin to download the block chain. This step will take at least several days, and it may take much more time on a slow Internet connection or with a slow computer. During the download, Bitcoin Core will use a significant part of your connection bandwidth. You can stop Bitcoin Core at any time by closing it; it will resume from the point where it stopped the next time you start it.
After download is complete, you may use Bitcoin Core as your wallet or you can just let it run to help support the Bitcoin network.
Optional: Start Your Node At Login.
Starting your node automatically each time you login to your computer makes it easy for you to contribute to the network. The easiest way to do this is to tell Bitcoin Core GUI to start at login. This only works in desktop environments that support the autostart specification, such as Gnome, KDE, and Unity.
While running Bitcoin Core GUI, open the Settings menu and choose Options. On the Main tab, click Start Bitcoin on system login . Click the Ok button to save the new settings.
The next time you login to your desktop, Bitcoin Core GUI should be automatically started as an icon in the tray.
If Bitcoin Core GUI does not automatically start, you may need to add it to an .xinit or .xsession file as described here.
You have now completed installing Bitcoin Core. If you have any questions, please ask in one of Bitcoin's many communities, such as Bitcoin StackExchange, BitcoinTalk technical support, or the #bitcoin IRC chatroom on Freenode.
To support the Bitcoin network, you also need to allow incoming connections. Please read the Network Configuration section for details.
Bitcoin Core Daemon.
If you're logged in as an administrative user with sudo access, you may log out. The steps in this section should be performed as the user you want to run Bitcoin Core. (This can be a locked account used only by Bitcoin Core.) If you changed users in a graphical interface, start a terminal.
Type the following command:
It will print a message that Bitcoin Core is starting. To interact with Bitcoin Core daemon, you will use the command bitcoin-cli (Bitcoin command line interface).
Note: it may take up to several minutes for Bitcoin Core to start, during which it will display the following message whenever you use bitcoin-cli :
After it starts, you may find the following commands useful for bASIC interaction with your node: getblockchaininfo , getnetworkinfo , getnettotals , getwalletinfo , stop , and help .
For example, to safely stop your node, run the following command:
A complete list of commands is available in the Bitcoin.org developer reference.
When Bitcoin Core daemon first starts, it will begin to download the block chain. This step will take at least several days, and it may take much more time on a slow Internet connection or with a slow computer. During the download, Bitcoin Core will use a significant part of your connection bandwidth. You can stop Bitcoin Core at any time using the stop command; it will resume from the point where it stopped the next time you start it.
Optional: Start Your Node At Boot.
Starting your node automatically each time your computer boots makes it easy for you to contribute to the network. The easiest way to do this is to start Bitcoin Core daemon from your crontab. To edit your crontab on most distributions, run the following command:
Scroll to the bottom of the file displayed and add the following line:
Save the file and exit; the updated crontab file will be installed for you. On most distributions, this will cause Bitcoin Core daemon to be automatically started each time your reboot your computer.
If you're a expert system administrator and want to use an init script instead, see the init scripts directory in Bitcoin Core's source tree.
Windows Instructions.
Windows 10.
Go to the Bitcoin Core download page and verify you have made a secure connection to the server.
Click the large blue Download Bitcoin Core button to download the Bitcoin Core installer to your desktop.
After downloading the file to your desktop or your Downloads folder ( C:\Users\ \Downloads ), run it by double-clicking its icon. Windows will ask you to confirm that you want to run it. Click Yes and the Bitcoin installer will start. It's a typical Windows installer, and it will guide you through the decisions you need to make about where to install Bitcoin Core.
If you want to use the Bitcoin Core Graphical User Interface (GUI), proceed to the Bitcoin Core GUI section below.
If you want to use the Bitcoin Core daemon (bitcoind), which is useful for programmers and advanced users, proceed to the Bitcoin Core Daemon section below.
If you want to use both the GUI and the daemon, read both the GUI instructions and the daemon instructions. Note that you can't run both the GUI and the daemon at the same time using the same configuration directory.
Press the Windows key ( ⊞ Win ) and start typing "bitcoin". When the Bitcoin Core icon appears (as shown below), click on it.
Your firewall may block Bitcoin Core from making outbound connections. It's safe to allow Bitcoin Core to use all networks. (Note: you will still need to configure inbound connections as described later in the Network Configuration section.)
Starting your node automatically each time you login to your computer makes it easy for you to contribute to the network. The easiest way to do this is to tell Bitcoin Core GUI to start at login.
The next time you login to your desktop, Bitcoin Core GUI will be automatically started minimized in the task bar.
Warning: to prevent data corruption, do not force shutdown of your computer from the Windows shutdown screen when you have Bitcoin Core running.
To start Bitcoin Core daemon, first open a command window: press the Windows key ( ⊞ Win ) and type "cmd". Choose the option labeled "Command Prompt".
If you installed Bitcoin Core into the default directory, type the following at the command prompt:
Bitcoin Core daemon should start. To interact with Bitcoin Core daemon, you will use the command bitcoin-cli (Bitcoin command line interface). If you installed Bitcoin Core into the default location, type the following at the command prompt to see whether it works:
Starting your node automatically each time your computer boots makes it easy for you to contribute to the network. The easiest way to do this is to start Bitcoin Core daemon when you login to your computer.
Start File Explorer and go to:
Right-click on the File Explorer window and choose New → Text file. Name the file start_bitcoind.bat . Then right-click on it and choose Open in Notepad (or whatever editor you prefer). Copy and paste the following line into the file.
(If you installed Bitcoin Core in a non-default directory, use that directory path instead.)
Save the file. The next time you login to your computer, Bitcoin Core daemon will be automatically started.

[Bitcoin]

Windows 8.x.
Windows 7.
Open the Start menu, type bitcoin into the search box, and click the Bitcoin Core icon.
To start Bitcoin Core daemon, first open a command window: press the Windows key ( ⊞ Win ) and type "cmd". Choose the program named "cmd.exe"
If you installed the Bitcoin Core into the default directory, type the following at the command prompt :
Bitcoin Core daemon should start. You can now try using Bitcoin Cli Utility.
To interact with Bitcoin Core daemon, you will use the command bitcoin-cli (Bitcoin command line interface). If you installed Bitcoin Core into the default location, type the following at the command prompt to see whether it works:
You can also access this folder by executing the following command after reaching the Execute. prompt :
Mac OS X Instructions.
Mac OS X Yosemite 10.10.x+
Click the large blue Download Bitcoin Core button to download the Bitcoin Core installer to your Downloads folder.
After downloading the file to your Downloads folder ( /Users/ /Downloads ), run it by double-clicking its icon. OS X will open a Finder window for you to drag Bitcoin Core to your Applications folder.
The first time running Bitcoin Core , Max OS X will ask you to confirm that you want to run it:
While running Bitcoin Core GUI, open the Bitcoin Core menu and choose Preferences. On the Main tab, click Start Bitcoin on system login . Click the Ok button to save the new settings.
The Bitcoin Core daemon (bitcoind) is not included in the .dmg file you may have downloaded to install Bitcoin-QT. Bitcoind, along with its support binaries, is instead included in the OS X .tar.gz file listed on the official Bitcoin Core download page. To download this file using Terminal, execute the following command:
Extract bitcoind and its support binaries from the archive we just downloaded by running this command in Terminal:
Now we'll move the executables into your default path to make running and stopping bitcoind easier. To move the executables, run these commands (note that we have to use sudo to perform these commands since we are modifying directories owned by root):
To clean up the directory we've been working in, run:
You should now be able to start up your full node by running bitcoind -daemon in any Terminal window. If you need to stop bitcoind for any reason, the command is bitcoin-cli stop.
Starting your node automatically each time you login to your computer makes it easy for you to contribute to the network. The easiest way to do this is to tell Bitcoin Core Daemon to start at login. In OS X, the way to start background programs at login is using a Launch Agent. Here is how to install a Launch Agent for Bitcoin Core daemon on your machine:
The next time you login to your desktop, Bitcoin Core daemon will be automatically started.
Upgrading Bitcoin Core.
If you are running an older version, shut it down. Wait until it has completely shut down (which might take a few minutes for older versions), then run the installer (on Windows) or just copy over /Applications/Bitcoin-Qt (on Mac) or bitcoind/bitcoin-qt (on Linux).
The blockchain and wallet files in the data directory are compatible between versions so there is no requirement to make any changes to the data directory when upgrading. Occasionally the format of those files changes, but the new Bitcoin Core version will include code that automatically upgrades the files to the new format so no manual intervention is required.
Sometimes upgrade of the blockchain data files from very old versions to the new versions is not supported. In those cases it may be necessary to redownload the blockchain. Check the release notes of the new version if you are planning to upgrade from a very old version.
Sometimes downgrade is not possible because of changes to the data files. Again, check the release notes for the new version if you are planning to downgrade.
Network Configuration.
If you want to support the Bitcoin network, you must allow inbound connections.
When Bitcoin Core starts, it establishes 8 outbound connections to other full nodes so it can download the latest blocks and transactions. If you just want to use your full node as a wallet, you don't need more than these 8 connections--but if you want to support lightweight clients and other full nodes on the network, you must allow inbound connections.
Servers connected directly to the Internet usually don't require any special configuration. You can use the testing instructions below to confirm your server-based node accepts inbound connections.
Home connections are usually filtered by a router or modem. Bitcoin Core will request your router automatically configure itself to allow inbound connections to Bitcoin's port, port 8333. Unfortunately many routers don't allow automatic configuration, so you must manually configure your router. You may also need to configure your firewall to allow inbound connections to port 8333. Please see the following subsections for details.
Testing Connections.
The BitNodes project provides an online tool to let you test whether your node accepts inbound connections. Before using BitNodes, you must first ensure that your node is fully synced with the block chain. Once you've done so, start Bitcoin Core (either the GUI or the daemon), wait 10 minutes, and then visit the Bitnodes page. The tool will attempt to guess your IP address--if the address is wrong (or blank), you will need to enter your address manually.
After you press Check Node, the tool will inform you whether your port is open (green box) or not open (red box). If you get the green box, you don't need to do anything--you accept inbound connections. If you get the red box, please read the enabling connections subsection.
For confirmation that you accept inbound connections, you can use Bitcoin Core. Bitcoin Core can't tell you directly whether you allow inbound connections, but it can tell you whether or not you currently have any inbound connections. If your node has been online for at least 30 minutes, it should normally have inbound connections. If want to check your peer info using Bitcoin Core, choose the appropriate instructions below:
GUI Peer Info.
In the bottom right corner of the Bitcoin Core GUI are several icons. If you hover over the signal strength icon, it will tell you how many connections you have. The icon won't turn green until you have more than 8 active connections, which only happens if inbound connections are allowed.
For confirmation, you can go to the Help menu, choose Debug Window, and open the Information tab. In the Network section, it will tell you exactly how many inbound connections you have. If the number is greater than zero, then inbound connections are allowed.
If you don't have inbound connections, please read the instructions for enabling inbound connections.
Daemon Peer Info.
The getconnectioncount command will tell you how many connections you have. If you have more than 8 connections, inbound connections are allowed. For example:
For confirmation, you can use the getpeerinfo command to get information about all of your peers. Each peer's details will include an inbound field set to true if the connection is inbound. If you have any inbound connections, then inbound connections are allowed.
If you don't have inbound connections, please read instructions for enabling inbound connections.
Enabling Connections.
If Bitcoin Core can't automatically configure your router to open port 8333, you will need to manually configure your router. We've tried to make the following instructions generic enough to cover most router models; if you need specific help with your router, please ask for help on a tech support site such as SuperUser.
Enabling inbound connections requires two steps, plus an extra third step for firewall users:
Giving your computer a static (unchanging) internal IP address by configuring the Dynamic Host Configuration Protocol (DHCP) on your router.
Forwarding inbound connections from the Internet through your router to your computer where Bitcoin Core can process them.
Configuring your firewall to allow inbound connections. This step mainly applies to Windows users, as Mac OS X and most Linuxes do not enable a firewall by default.
Configuring DHCP.
In order for your router to direct incoming port 8333 connections to your computer, it needs to know your computer's internal IP address. However, routers usually give computers dynamic IP addresses that change frequently, so we need to ensure your router always gives your computer the same internal IP address.
Start by logging into your router's administration interface. Most routers can be configured using one of the following URLs, so keep clicking links until you find one that works. If none work, consult your router's manual.
http://192.168.0.1 (some Linksys/Cisco models) http://192.168.1.1 (some D-Link/Netgear models) http://192.168.2.1 (some Belkin/SMC models) http://192.168.123.254 (some US Robotics models) http://10.0.1.1 (some Apple models)
Upon connecting, you will probably be prompted for a username and password. If you configured a password, enter it now. If not, the Router Passwords site provides a database of known default username and password pairs.
After logging in, you want to search your router's menus for options related to DHCP, the Dynamic Host Configuration Protocol. These options may also be called Address Reservation. For example, the router page shown below calls the option we need "DHCP Reservation":
In the reservation configuration, some routers will display a list of computers and devices currently connected to your network, and then let you select a device to make its current IP address permanent:
If that's the case, find the computer running Bitcoin Core in the list, select it, and add it to the list of reserved addresses. Make a note of its current IP address--we'll use the address in the next section.
Other routers require a more manual configuration. For these routers, you will need to look up the fixed address (MAC address) for your computer's network card and add it to the list. This operation differs by operating system:
Windows 7 & 8: Press Win-R (Windows key plus the R key) to open the Run dialog. Type cmd to open the console. Type ipconfig /all and find the result that best matches your connection--usually a wireless connection. Look for a line that starts with "Physical Address" and contains a value like this:
Replace all the dashes with colons, so the address looks like this: 01:23:45:67:89:AB. Use that address in the instructions below.
Linux: open a terminal and type ifconfig . Find the result that best matches your connection--a result starting with wlan indicates a wireless connection. Find the field that starts with HWaddr and copy the immediately following field that looks like 01:23:45:67:89:ab. Use that value in the instructions below.
Mac OS X: open a terminal and type ifconfig . Find the result that best matches your connection--a result starting with en1 usually indicates a wireless connection. Find the field that starts with ether: and copy the immediately following field that looks like 01:23:45:67:89:ab. Use that value in the instructions below.
Once you have the MAC address, you can fill it into to your router's manual DHCP assignment table, as illustrated below. Also choose an IP address and make a note of it for the instructions in the next subsection. After entering this information, click the Add or Save button.
Then reboot your computer to ensure it gets assigned the address you selected and proceed to the Port Forwarding instructions below.
Port Forwarding.
For this step, you need to know the local IP address of the computer running Bitcoin Core. You should have this information from configuring the DHCP assignment table in the subsection above.
Login to your router using the same steps described near the top of the DHCP subsection. Look for an option called Port Forwarding, Port Assignment, or anything with "Port" in its name. On some routers, this option is buried in an Applications & Gaming menu.
The port forwarding settings should allow you to map an external port on your router to the "internal port" of a device on your network as shown in the screenshot below.
Both the external port and the internal port should be 8333 for Bitcoin. (You may also want to map port 18333 for Bitcoin's testnet, although this guide does not cover using testnet.) Make sure the IP address you enter is the same one you configured in the previous subsection.
After filling in the details for the mapping, save the entry. You should not need to restart anything. Start Bitcoin Core (if you haven't already) and follow the Testing Connections instructions to test your connection.
If you still can't connect and you use a firewall, you probably need to change your firewall settings. See the Firewall section below.
If something else went wrong, it's probably a problem with your router configuration. Re-read the instructions above to see if you missed anything, search the web for help with "port forwarding", and ask for help on sites like SuperUser.
We can't provide direct support, but if you see a way to improve these instructions, please open an issue.

[Bitcoin]

Firewall Configuration.
Firewalls block inbound connections. To use Bitcoin, you need to configure your computer's firewall to allow connections to port 8333. This is usually as easy as starting your firewall configuration software and defining a new rule to allow inbound connections to port 8333. For additional information for Windows, see the links below:
Mac OS X comes with its firewall disabled by default, but if you have enabled it, see the section Allowing Specific Applications from the official Apple guide.
Ubuntu also comes with its firewall disabled by default, but if you have enabled it, see the Ubuntu wiki page for information about adding port forwarding rules.
Once you have allowed inbound connections to port 8333, start Bitcoin Core (if you haven't already) and follow the Testing Connections instructions to test your connection.
If something else went wrong re-read the DHCP, port forwarding, and firewall instructions above to see if you missed anything, search the web for help with "port forwarding" and "opening firewall ports", and ask for help on sites like SuperUser.
Configuration Tuning.
This section contains advice about how to change your Bitcoin Core configuration to adapt it to your needs.
There are two ways to change your configuration. The first is to start Bitcoin Core with the options you want. For example, if you want to limit it to using one CPU core for signature verification, you can start Bitcoin Core like this:
Once you've decided you like an option, you can add it to the Bitcoin Core configuration file. You can find that file in the following directories:
OSX: $HOME/Library/Application Support/Bitcoin/
To add an option to the configuration file, just remove its leading dash. You may also need to remove any quotation marks you used in your shell. For example, the -par option seen above would look like this in the configuration file:
A user-friendly configuration file generator is available here. If you have any questions about configuring Bitcoin Core, please stop by one of our forums or live chatrooms.
Reduce Storage.
It is possible to configure your node to to run in pruned mode in order to reduce storage requirements. This can reduce the disk usage from over 350GB to around 5GB.
Running a node in pruned mode is incompatible with -txindex and -rescan . It also disables the RPC importwallet . Two RPCs that are available and potentially helpful, however, are importprunedfunds and removeprunedfunds .
To enable block pruning set prune=N on the command line or in bitcoin.conf , where N is the number of MiB to allot for raw block and undo data.
A value of 0 disables pruning. The minimal value above 0 is 550 . Your wallet is as secure with high values as it is with low ones. Higher values merely ensure that your node will not shut down upon blockchain reorganizations of more than 2 days - which are unlikely to happen in practice. In future releases, a higher value may also help the network as a whole because stored blocks could be served to other nodes.
Reduce Traffic.
Some node operators need to deal with bandwidth caps imposed by their ISPs.
By default, Bitcoin Core allows up to 125 connections to different peers, 8 of which are outbound. You can therefore have at most 117 inbound connections.
The default settings can result in relatively significant traffic consumption.
Ways to reduce traffic:
Maximum Upload Targets.
A major component of the traffic is caused by serving historic blocks to other nodes during the initial blocks download phase (syncing up a new node). This option can be specified in MiB per day and is turned off by default. This is not a hard limit; only a threshold to minimize the outbound traffic. When the limit is about to be reached, the uploaded data is cut by no longer serving historic blocks (blocks older than one week). Keep in mind that new nodes require other nodes that are willing to serve historic blocks. The recommended minimum is 144 blocks per day (max. 144MiB per day)
Disable listening.
Disabling listening will result in fewer nodes connected (remember the maximum of 8 outbound peers). Fewer nodes will result in less traffic usage as you are relaying blocks and transactions to fewer nodes.
Reduce maximum connections.
Reducing the maximum connected nodes to a minimum could be desirable if traffic limits are tiny. Keep in mind that Bitcoin's trustless model works best if you are connected to a handful of nodes.
Blocks-only mode.
Causes your node to stop requesting and relaying transactions unless they are part of a block and also disables listening as described above.
This reduces your node's bandwidth to the absolute minimum necessary to stay synchronized with the network, about 150 megabytes incoming data per day and about 1 megabyte of outgoing data per day, but it does mean that your node won't see incoming transactions until they've received at least one confirmation.
You will still be able to send transactions from the built-in wallet or from peers you've whitelisted using the -whitelist parameter.
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