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+--- Thread: [Tut] Keep SSH Session Alive (/thread-100995.html)
[Tut] Keep SSH Session Alive - xSicKxBot - 04-19-2023
Keep SSH Session Alive
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<div class="kksr-legend" style="font-size: 19.2px;"> 5/5 – (1 vote) </div>
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<h2 class="wp-block-heading">Problem Formulation</h2>
<p>I just tried to run <a rel="noreferrer noopener" href="https://blog.finxter.com/what-is-autogpt-and-how-to-get-started-your-quick-guide-to-success/" data-type="post" data-id="1292053" target="_blank">AutoGPT</a> on an EC2 instance using SSH from my local Windows machine. But here’s the annoying part: <strong>the connection always closes and AutoGPT can only work in small ~10 minute increments</strong>. When I return to my machine, I need to SSH into my instance and restart the program.</p>
<p class="has-global-color-8-background-color has-background"><img src="https://s.w.org/images/core/emoji/14.0.0/72x72/2694.png" alt="⚔" class="wp-smiley" style="height: 1em; max-height: 1em;" /> <strong>Problem Formulation</strong>: Your SSH connection to a remote server works properly at your workplace, but it freezes after 10-15 minutes when connecting from home. You don’t receive any error messages, but you notice zombie login users that need to be killed manually.</p>
<h2 class="wp-block-heading">Quick and Easy Solution (Client-Side)</h2>
<p>To prevent an SSH connection from closing when the client goes silent, you can configure the client to send a keep-alive signal to the server periodically. </p>
<p>Create a configuration file in your home directory at <code>$HOME/.ssh/config</code>, and set its permissions to <code>600</code> using <code><code>chmod 600 ~/.ssh/config</code></code> after file creation. To send a keep-alive signal every 240 seconds, for example, add the following lines to the configuration file:</p>
<pre class="wp-block-preformatted"><code>Host * ServerAliveInterval 240</code></pre>
<p>You can get this done with the following two commands on Linux:</p>
<pre class="wp-block-preformatted"><code>printf '%s\n' 'Host *' ' ServerAliveInterval 240' > ~/.ssh/config
chmod 600 ~/.ssh/config</code></pre>
<p>You can then check the file content using the command <code>cat ~/.ssh/config</code> like so:</p>
<figure class="wp-block-image size-full"><img loading="lazy" decoding="async" width="986" height="168" src="https://blog.finxter.com/wp-content/uploads/2023/04/image-186.png" alt="" class="wp-image-1302658" srcset="https://blog.finxter.com/wp-content/uploads/2023/04/image-186.png 986w, https://blog.finxter.com/wp-content/uploads/2023/04/image-186-300x51.png 300w, https://blog.finxter.com/wp-content/uploads/2023/04/image-186-768x131.png 768w" sizes="(max-width: 986px) 100vw, 986px" /></figure>
<h2 class="wp-block-heading">Alternative Solution: Server Side</h2>
<p class="has-base-2-background-color has-background">In some cases, you have access to the server’s SSH settings. In that case, add an entry <code>ClientAliveInterval 60</code> to the file <code>/etc/ssh/sshd_config</code>. I used the Vim editor in the terminal to accomplish this.</p>
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<figure class="aligncenter size-full"><img decoding="async" loading="lazy" width="776" height="517" src="https://blog.finxter.com/wp-content/uploads/2023/04/image-187.png" alt="" class="wp-image-1302803" srcset="https://blog.finxter.com/wp-content/uploads/2023/04/image-187.png 776w, https://blog.finxter.com/wp-content/uploads/2023/04/image-187-300x200.png 300w, https://blog.finxter.com/wp-content/uploads/2023/04/image-187-768x512.png 768w" sizes="(max-width: 776px) 100vw, 776px" /></figure>
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<p>Do you want to keep improving your coding and tech skills? Feel free to check out our Python and tech academy by downloading your free cheat sheets for starters:</p>
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https://www.sickgaming.net/blog/2023/04/18/keep-ssh-session-alive/