177 lines
6.4 KiB
HTML
177 lines
6.4 KiB
HTML
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<title>ssh Cheatsheet - Launch Pad</title>
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__ _______________________ _________._________________________
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/ \ / \_ _____/\______ \/ _____/| \__ ___/\_ _____/
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\ \/\/ /| __)_ | | _/\_____ \ | | | | | __)_
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\__/\ / /_______ / |______ /_______ /|___| |____| /_______ /
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<div class="blog-header-content">
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<svg xmlns="http://www.w3.org/2000/svg" width="42" height="42" viewBox="0 0 24 24" class="home-icon"><path fill="currentColor" d="M10 20v-6h4v6h5v-8h3L12 3 2 12h3v8z"/></svg>
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<h1 class="blog-page-title">ssh Cheatsheet</h1>
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</div>
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</div>
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<div class="blog-post-container">
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<div class="blog-posts-container" style="max-width: 900px; margin: 0 auto;">
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<div class="blog-post">
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<div class="blog-post-content">
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<p><a href="index.html">← Back to cheatsheets</a></p>
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<p><a href="../index.html">← Home</a></p>
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<hr>
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<p>SSH (Secure Shell) is a protocol for secure remote login and command execution. Essential for managing remote servers, secure file transfer, and tunneling.</p>
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<hr>
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<h2>Basic Connection</h2>
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<ul>
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<li>ssh user@hostname - Connect to remote host</li>
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</ul>
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<ul>
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<li>ssh user@hostname -p 2222 - Connect on custom port</li>
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</ul>
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<ul>
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<li>ssh -i ~/.ssh/key.pem user@hostname - Use specific key file</li>
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</ul>
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<ul>
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<li>ssh -v user@hostname - Verbose output (debugging)</li>
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</ul>
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<hr>
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<h2>Port Forwarding</h2>
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<ul>
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<li>ssh -L 8080:localhost:80 user@hostname - Local port forward</li>
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</ul>
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<ul>
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<li>ssh -R 8080:localhost:80 user@hostname - Remote port forward</li>
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</ul>
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<ul>
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<li>ssh -D 1080 user@hostname - Dynamic SOCKS proxy</li>
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</ul>
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<ul>
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<li>ssh -L 8080:remote:80 -N user@hostname - Forward without shell</li>
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</ul>
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<hr>
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<h2>File Transfer</h2>
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<ul>
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<li>scp file.txt user@hostname:/path/ - Copy file to remote</li>
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</ul>
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<ul>
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<li>scp user@hostname:/path/file.txt . - Copy file from remote</li>
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</ul>
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<ul>
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<li>scp -r dir/ user@hostname:/path/ - Copy directory recursively</li>
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</ul>
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<ul>
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<li>rsync -avz dir/ user@hostname:/path/ - Sync with rsync</li>
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</ul>
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<hr>
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<h2>Remote Execution</h2>
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<ul>
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<li>ssh user@hostname "command" - Execute command remotely</li>
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</ul>
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<ul>
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<li>ssh user@hostname "cat file.txt" - Read remote file</li>
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</ul>
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<ul>
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<li>cat file.txt | ssh user@hostname "cat > remote.txt" - Pipe to remote</li>
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</ul>
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<hr>
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<h2>Configuration</h2>
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<ul>
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<li>~/.ssh/config - SSH client configuration file</li>
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</ul>
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<ul>
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<li>Host alias - Define host alias</li>
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</ul>
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<ul>
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<li>HostName real.hostname.com - Set hostname</li>
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</ul>
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<ul>
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<li>User username - Set default user</li>
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</ul>
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<ul>
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<li>IdentityFile ~/.ssh/key - Specify key file</li>
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</ul>
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<ul>
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<li>Port 2222 - Set port</li>
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</ul>
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<hr>
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<h2>Common Examples</h2>
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<h3>Basic Connection</h3>
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<pre><code>ssh user@example.com</code></pre>
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<p>Connect to remote server.</p>
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<h3>Port Forwarding</h3>
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<pre><code>ssh -L 8080:localhost:80 user@example.com</code></pre>
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<p>Forward local port 8080 to remote port 80.</p>
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<h3>Copy File</h3>
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<pre><code>scp file.txt user@example.com:/home/user/</code></pre>
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<p>Copy file to remote server.</p>
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<h3>Execute Command</h3>
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<pre><code>ssh user@example.com "ls -la"</code></pre>
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<p>Run command on remote server.</p>
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<h3>SSH Config</h3>
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<pre><code>Host myserver
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HostName example.com
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User myuser
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IdentityFile ~/.ssh/id_ed25519
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Port 2222</code></pre>
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<p>Configure SSH alias in ~/.ssh/config.</p>
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<hr>
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<h2>Tips</h2>
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<ul>
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<li>Use key-based authentication instead of passwords</li>
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</ul>
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<ul>
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<li>Configure ~/.ssh/config for easier connections</li>
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</ul>
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<ul>
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<li>Use -N flag for port forwarding without shell</li>
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</ul>
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<ul>
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<li>rsync is often faster than scp for large transfers</li>
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</ul>
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<ul>
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<li>Use ControlMaster for connection multiplexing</li>
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</ul>
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<ul>
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<li>Keep SSH keys secure and use passphrases</li>
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</ul>
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<ul>
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<li>Disable password authentication on servers when possible</li>
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</ul>
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</div>
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</div>
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</div>
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</div>
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