63 lines
1.6 KiB
HTML
63 lines
1.6 KiB
HTML
---
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layout: page
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category-page: intermediate
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category-title: Intermediate commands
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tags: remote connection host server file
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author: Announ Marwan
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title: ssh
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---
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The <code>ssh</code> command is used to operate with a remote machine using
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the <i>ssh</i> protocol. It's commonly used for logging into a remote
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machine and execute commands from a terminal interface.
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<h3>Log into a server</h3>
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To log in a remote server you need an user account which is
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usually created by the server admin and a password.
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<pre>
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localhost:[~]> ssh username@remote-server
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remote-server:[~]>
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</pre>
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Once you're logged in, the local machine shell will be
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<i>replaced</i> by the remote server's one.<br>
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<h3>Log out of a server</h3>
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<ul>
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<li>Press <code>⌘ + D</code></li>
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<li>Run the command <code>logout</code></li>
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<li>Run the command <code>exit</code></li>
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</ul>
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<h3>Run a command on a remote machine</h3>
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<pre>
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localhost:[~]:> ssh user@remote-host "ls test"
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online-backup.dat
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online-storage
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unix-dedicated-server.txt
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</pre>
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<h3>Debug the client</h3>
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Debugging the ssh client can be useful to resolve connection errors.
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<pre>
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localhost:[~]:> ssh -v user@remote-host
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OpenSSH_4.3p2, OpenSSL 0.9.8e-fips-rhel5 01 Jul 2008
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debug1: Reading configuration data /etc/ssh/ssh_config
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debug1: Applying options for *
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debug1: Connecting to remote-host [172.22.200.140] port 22.
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debug1: Connection established.
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debug1: identity file /home/user/.ssh/identity type -1
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debug1: identity file /home/user/.ssh/id_rsa type -1
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debug1: identity file /home/user/.ssh/id_dsa type 2
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debug1: loaded 3 keys
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...
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</pre>
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