Editing Ssh (OpenSSH client)

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{{lowercase}}
 
 
<code>ssh</code><ref>http://man7.org/linux/man-pages/man1/ssh.1.html</ref> is the [[OpenSSH]] [[ssh clients|ssh client]] for logging or executing commands into remote devices/machines
 
<code>ssh</code><ref>http://man7.org/linux/man-pages/man1/ssh.1.html</ref> is the [[OpenSSH]] [[ssh clients|ssh client]] for logging or executing commands into remote devices/machines
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* Man page: https://linux.die.net/man/1/ssh
 
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* <code>[[ssh --help]]</code>
 
  
 
       ssh [-46AaCfGgKkMNnqsTtVvXxYy] [-B bind_interface] [-b bind_address] [-c cipher_spec] [-D [bind_address:]port]
 
       ssh [-46AaCfGgKkMNnqsTtVvXxYy] [-B bind_interface] [-b bind_address] [-c cipher_spec] [-D [bind_address:]port]
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         [-W host:port] [-w local_tun[:remote_tun]] destination [command]
 
         [-W host:port] [-w local_tun[:remote_tun]] destination [command]
  
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* <code>-X Enables X11 [[forwarding]]</code>
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-X Enables X11 forwarding
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* <code>-N Do not execute a [[remote command]]. This is usefull for just [[forwarding]] ports</code>
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* <code>[[ssh -vvv]]</code>
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[[OpenSSH changelog|ssh -V]]
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* <code>[[ssh -V]]</code>
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* <code>[[ssh -t]]</code>
 
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* <code>[[ssh -O]]</code>
 
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* <code>ssh -o ConnectTimeout=100</code>
 
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* <code>[[ssh -i]]</code>
 
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* <code>[[ssh -L]]</code>
 
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* <code>[[ssh -R]]</code>
 
  
 
Windows: Settings > Apps and click “Manage optional features” under Apps & features.
 
Windows: Settings > Apps and click “Manage optional features” under Apps & features.
  
 
== Configuration ==
 
== Configuration ==
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* Configuration file: <code>[[~/.ssh/config]]</code>
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* Configuration file: <code>~/.ssh/[[config]]</code>
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* <code>[[~/.ssh/environment]]</code>
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== Usage ==
 
== Usage ==
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* <code>[[ssh]] remote_User@server_Name_Or_IP</code>
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* <code>[[ssh]] REMOTE_USERNAME@REMOTE_SERVER_NAME_OR_IP</code>
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* <code>ssh  [email protected] -p 1111 [[-i]] ./yourprivkey</code>
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* <code>[[ssh]] -vvv REMOTE_USERNAME@REMOTE_SERVER_NAME_OR_IP</code> (<code>-v</code> increase verbosity, maximum 3)
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* <code>[[ssh -vvv]] REMOTE_USERNAME@REMOTE_SERVER_NAME_OR_IP</code> (<code>-v</code> increase verbosity, maximum 3)
 
 
** <code>[[ssh]] -vvv REMOTE_USERNAME@REMOTE_SERVER_NAME_OR_IP 2>&1 | grep "STRING_TO_SEARCH" </code>  
 
** <code>[[ssh]] -vvv REMOTE_USERNAME@REMOTE_SERVER_NAME_OR_IP 2>&1 | grep "STRING_TO_SEARCH" </code>  
 
Execute a remote command:
 
Execute a remote command:
 
* <code>ssh USERNAME@SERVER_NAME  '/path/to/remote/scripts/backup.[[sh]]'</code>
 
* <code>ssh USERNAME@SERVER_NAME  '/path/to/remote/scripts/backup.[[sh]]'</code>
  
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* <code>[[ssh -Q]] kex SERVER</code>
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* <code>ssh -Q kex SERVER</code>
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== Example commands ==
 
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* <code>ssh -o [[StrictHostKeyChecking]]=accept-new [email protected]</code> (since [[OpenSSH 7.5]], March 2017)
 
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* <code>ssh -o StrictHostKeyChecking=no [email protected]</code><ref>https://serverfault.com/a/132973</ref>
 
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* <code>ssh -Q [[kex]] SERVER</code>
 
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* <code>ssh -o [[MACs]]=[[hmac-sha2-256]] HOSTNAME</code>
 
  
 
== [[Multiplexing]] options ==
 
== [[Multiplexing]] options ==
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[[ssh -O]] check server.example.org or ssh -O check [email protected]  
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<pre>ssh -O check server.example.org or ssh -O check [email protected]  
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Master running (pid=26289)
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Master running (pid=26289)
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</pre>
  
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ssh -O check [email protected]  
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<pre>
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Control socket connect(/path/): No such file or directory
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ssh -O check [email protected]  
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Control socket connect(/path/): No such file or directory
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</pre>
  
 
To stop an specific multiplexed session:
 
To stop an specific multiplexed session:
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== Logs ==
 
== Logs ==
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  [[ssh -i]] id_ed25519_xxxxx.pub SERVER_NAME
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  ssh -i id_ed25519_xxxxx.pub SERVER_NAME
 
  Load key "id_ed25519_xxxxx.pub": invalid format
 
  Load key "id_ed25519_xxxxx.pub": invalid format
 
  Solution:
 
  Solution:
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  ssh -i id_ed25519_xxxxx SERVER_NAME
 
  ssh -i id_ed25519_xxxxx SERVER_NAME
  
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* <code>[[Unable to negotiate with]] ([[KexAlgorithms]])</code>
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* [[Unable to negotiate with]] ([[KexAlgorithms]])
  
 
== Activities ==
 
== Activities ==
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* [[Configure OpenSSH to reuse ssh connections]]
 
* [[Configure OpenSSH to reuse ssh connections]]
 
* [[Execute a command in parallel by ssh]]
 
* [[Execute a command in parallel by ssh]]
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* <code>[[ssh]] -o [[PreferredAuthentications]]=keyboard-interactive -o [[PubkeyAuthentication]]=no host1.example.org</code>
 
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* [[Reverse SSH tunneling]]
 
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== Configuration ==
 
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* <code>[[CheckHostIP]]</code>
 
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== Related ==
 
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* <code>[[gcloud compute ssh]]</code>
 
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* [[Load key ... invalid format]]
 
  
 
== See also ==
 
== See also ==
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* {{ssh (openSSH)}}
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* {{OpenSSH}}
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* {{ncat}}
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* {{tmux}}
 
* {{ssh clients}}
 
* {{ssh clients}}
  
 
[[Category:Networking]]
 
[[Category:Networking]]
 
[[Category:Linux]]
 
[[Category:Linux]]

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