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<h1>
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Installing bitcoind on raspberry pi
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<time class="published" datetime="2018-01-03T16:51:00+01:00">
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03 janvier 2018
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</li>
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<li>Cryptocurrencies</li>
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<li>Bitcoin</li>
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</ol>
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</header>
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<div class='article_content'>
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<h3>Installing bitcoind on linux</h3>
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<p>Running a full bitcoin node helps the bitcoin network to accept, validate and relay transactions. If you want to volunteer some spare computing and bandwidth resources to run a full node and allow Bitcoin to continue to grow you can grab an inexpensive and power efficient raspberry pi and turn it into a full node.</p>
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<p>There are plenty of tutorials on the Internet explaining how to install a bitcoin full node; this tutorial won't go over setting up a raspberry pi and using ssh.</p>
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<p>In order to store the full blockchain we will mount a network drive and tell bitcoind to use this mapped drive as the data directory.</p>
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<h4>Download the bitcoin client</h4>
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<p>Go to <a href="https://bitcoin.org/en/download">https://bitcoin.org/en/download</a></p>
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<p><img alt="png" src="../images/Installing_bitcoind_on_raspberry_pi/1.png"></p>
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<p>Copy the URL for the ARM 32 bit version and download it onto your raspberry pi. </p>
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<div class="highlight"><pre><span></span>wget https://bitcoin.org/bin/bitcoin-core-0.15.1/bitcoin-0.15.1-arm-linux-gnueabihf.tar.gz
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</pre></div>
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<p>Locate the downloaded file and extract it using the arguement xzf</p>
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<div class="highlight"><pre><span></span>tar xzf bitcoin-0.15.1-arm-linux-gnueabihf.tar.gz
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</pre></div>
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<p>a new directory <em>bitcoin-0.15.1</em> will be created, it contrains the files we need to install the software</p>
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<h4>Install the bitcoin client</h4>
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<p>We will install the content by copying the binaries located in the bin folder into /usr/local/bin by using the install command.
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You must use sudo because it will write data to a system directory</p>
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<div class="highlight"><pre><span></span>sudo install -m <span class="m">0755</span> -o root -g root -t /usr/local/bin bitcoin-0.15.1/bin/*
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</pre></div>
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<p>Launch the bitcoin core client by running </p>
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<div class="highlight"><pre><span></span>bitcoind -daemon
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</pre></div>
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<h3>Configuration of the node</h3>
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<h4>Start your node at boot</h4>
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<p>Starting you node automatically at boot time is a good idea because it doesn't require a manual action from the user. The simplest way to achive this is to create a cronjob. </p>
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<p>Run the following command </p>
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<div class="highlight"><pre><span></span>crontab -e
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</pre></div>
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<p>Select the text editor of your choice, then add the following line at the end of the file</p>
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<div class="highlight"><pre><span></span>@reboot bitcoind -daemon
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</pre></div>
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<p>Save the file and exit; the updated crontab file will be installed for you.</p>
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<h4>Full Node</h4>
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<p>If you can afford to download and store all the blockchain, you can run a full node. At the time of writing, the blockchain is 150Go (<a href="https://blockchain.info/fr/charts/blocks-size">https://blockchain.info/fr/charts/blocks-size</a>). Tree ways to store this are :
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<em> use a microSD with 256Go or more
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</em> add a thumbdrive or an external drive to your raspberry pi
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* mount a network drive from a NAS</p>
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<p>If you have purchased a big SD card then you can leave the default location for the blockchain data (~/.bitcoin/).
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Otherwise, you will have to change the datadir location to where your drive is mounted (in my case I have mounted it to /mnt)</p>
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<p>In order to configure your bitcoin client, edit/create the file bitcoin.conf located in ~/.bitcoin/</p>
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<div class="highlight"><pre><span></span>nano ~/.bitcoin/bitcoin.conf
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</pre></div>
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<p>copy the following text</p>
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<div class="highlight"><pre><span></span># From redoules.github.io
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# This config should be placed in following path:
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# ~/.bitcoin/bitcoin.conf
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# [core]
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# Specify a non-default location to store blockchain and other data.
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datadir=/mnt
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# Set database cache size in megabytes; machines sync faster with a larger cache. Recommend setting as high as possible based upon mach$
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dbcache=100
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# Keep at most <n> unconnectable transactions in memory.
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maxorphantx=10
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# Keep the transaction memory pool below <n> megabytess.
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maxmempool=50
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# [network]
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# Maintain at most N connections to peers.
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maxconnections=40
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# Tries to keep outbound traffic under the given target (in MiB per 24h), 0 = no limit.
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maxuploadtarget=5000
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</pre></div>
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<p>Check <a href="https://jlopp.github.io/bitcoin-core-config-generator">https://jlopp.github.io/bitcoin-core-config-generator</a> it is a handy site to edit the bitcoin.conf file</p>
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<h4>Pruning node</h4>
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<p>If you don't want to store the entire blockchain you can run a pruning node which reduces storage requirements by enabling pruning (deleting) of old blocks. </p>
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<p>Let's say you want to allocated at most 5Go to the blockchain, then specify prune=5000 into your bitcoin.conf file. Edit/create the file bitcoin.conf located in ~/.bitcoin/</p>
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<div class="highlight"><pre><span></span>nano ~/.bitcoin/bitcoin.conf
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</pre></div>
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<p>copy the following text</p>
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<div class="highlight"><pre><span></span># From redoules.github.io
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# This config should be placed in following path:
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# ~/.bitcoin/bitcoin.conf
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# [core]
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# Set database cache size in megabytes; machines sync faster with a larger cache. Recommend setting as high as possible based upon mach$
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dbcache=100
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# Keep at most <n> unconnectable transactions in memory.
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maxorphantx=10
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# Keep the transaction memory pool below <n> megabytess.
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maxmempool=50
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# Reduce storage requirements by only storing most recent N MiB of block. This mode is incompatible with -txindex and -rescan. WARNING: Reverting this setting requires re-downloading the entire blockchain. (default: 0 = disable pruning blocks, 1 = allow manual pruning via RPC, greater than 550 = automatically prune blocks to stay under target size in MiB).
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prune=5000
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# [network]
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# Maintain at most N connections to peers.
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maxconnections=40
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# Tries to keep outbound traffic under the given target (in MiB per 24h), 0 = no limit.
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maxuploadtarget=5000
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</pre></div>
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<h3>Checking if your node is public</h3>
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<p>one of the best way to help the bitcoin network is to allow your node to be visible and to propagate block to other nodes.</p>
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<p>The bitcoin protocole uses port 8333, other clients should be able to share information with your client.</p>
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<p>Run </p>
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<div class="highlight"><pre><span></span>ifconfig
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</pre></div>
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<p>and check if you have an ipv6 adresse (look for adr inet6:)</p>
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<h4>IPV6</h4>
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<p>Get the global ipv6 adresse of your raspberry pi</p>
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<div class="highlight"><pre><span></span> Link encap:Ethernet HWaddr xx:xx:xx:xx:xx:xx
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inet adr:192.168.1.x Bcast:192.168.1.255 Masque:255.255.255.0
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adr inet6: xxxx::xxxx:xxxx:xxxx:xxxx/64 Scope:Lien
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adr inet6: xxxx:xxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx/64 Scope:Global
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UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
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RX packets:42681744 errors:0 dropped:0 overruns:0 frame:0
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TX packets:38447218 errors:0 dropped:0 overruns:0 carrier:0
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collisions:0 lg file transmission:1000
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RX bytes:3044414780 (2.8 GiB) TX bytes:2599878680 (2.4 GiB)
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</pre></div>
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<p>it is located between adr inet4 and Scope:Global</p>
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<div class="highlight"><pre><span></span>adr inet6: xxxx:xxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx/64 Scope:Global
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</pre></div>
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<p>Copy this adresse and past it into the search field on <a href="https://bitnodes.earn.com/">https://bitnodes.earn.com/</a></p>
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<p><img alt="jpg" src="../images/Installing_bitcoind_on_raspberry_pi/2.jpg"></p>
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<p>If your node is visible, it will appear on the website</p>
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<p><img alt="jpg" src="../images/Installing_bitcoind_on_raspberry_pi/3.jpg"></p>
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<h4>IPV4</h4>
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<p>If you don't have an ipv6 adresse, you will have to open port 8333 on your router and redirect it to the internal IP of your raspberry pi.</p>
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<p>It is not detailed here because the configuration depends on your router.</p>
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<h3>Find an error or bug? Have a suggestion?</h3>
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<p>Everything on this site is avaliable on GitHub. Head on over and <a href='https://github.com/redoules/redoules.github.io/issues/new'>submit an issue.</a> You can also message me directly by <a href='mailto:guillaume.redoules@gadz.org'>email</a>.</p>
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Copyright © Guillaume Redoulès,
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<time datetime="2018">2018</time>.
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