I'd like to be able to setup a command to run on ssh login to a server, without needing to type it. Basically I'm looking for the ssh config file equivalent of:
ssh host command
so that all I need to type is:
and the command gets run.
It is also possible to insert a command in your authorized keys file. (
~/.ssh/authorized_keys). This allows you to execute a custom command for each key in the file. I use this to forward shell connections through my firewall. The result is that I can ssh to one host and it automatically connects the session to a host inside the network. The
authorized_keys entry looks like this:
command="ssh -Tq <hostname> \"$SSH_ORIGINAL_COMMAND\"",no-port-forwarding,no-agent-forwarding,no-X11-forwarding,no-pty ssh-rsa AAAA... the rest of the key ...
More specifically the redirect is for my gitolite instance. This allows simple outside access without directly exposing the gitolite host to any external access. Check the man page for more info. ( http://linux.die.net/man/8/sshd )
If you are running OpenSSH, it looks like
~/.ssh/rc is executed upon login.
You could set up a bash alias.
In your .bashrc file, put:
alias ssl='ssh some_host run_command'
Then you wouldn't even have to type the hostname.
Or, if you wanted to do this with multiple hosts(and multiple aliases wouldn't work), then use a small script:
kevin@box:~$ cat ssl.sh #!/bin/sh ssh $1 some_command kevin@box:~$