Ssh (OpenSSH client)

ssh is the OpenSSH ssh client for logging or executing commands into remote devices/machines

Usage

• ssh REMOTE_USERNAME@REMOTE_SERVER_NAME_OR_IP
• ssh -vvv REMOTE_USERNAME@REMOTE_SERVER_NAME_OR_IP (-v increase verbosity, maximum 3)
  • ssh -vvv REMOTE_USERNAME@REMOTE_SERVER_NAME_OR_IP 2>&1 | grep "STRING_TO_SEARCH"

Multiplexing options

ssh -O check server.example.org or ssh -O check [email protected] 
Master running (pid=26289)

ssh -O check [email protected] 
Control socket connect(/path/): No such file or directory

To stop an specific multiplexed session:

ssh -O stop [email protected]

Avoid using Multiplexing for a connections:

ssh -o "ControlMaster=no" server.example.org

Activities

• Understand differences between stop and exit: ssh -O exit [email protected]

See also

• ncat

http://man7.org/linux/man-pages/man1/ssh.1.html