1 (one) line if then statement while ssh to remote server

does anyone knows how i can do if then statment in 1 (one) line when I ssh to remote server?

 

and/or

does anyone know how you can run multiple line script through single connection via ssh?

 

You don't need to put it in one line. Just paste your shell code into the shell and hit enter.

 

actually .. i _do_ need it in 1 line

 

Can you use the line continuation character

Code:

\

?
Put this as the last char and the shell will wait for a next line. But I'm not sure I understand your question correctly.

 

what i want my script to do is:

to ssh to a remote server
check sshd_config for AuthorizedKeysFile
check if there is ~/.ssh
copy public key from original host ~/.ssh/*pub to a remote host ~/`grep AuthorizedKeysFile /etc/ssh/sshd_config | awk '{print $2}'`

and i dont want to type password 2-3 times, i want this to be done in one line so i only have to type password once

 

You can do it like this:

Code:

ssh user@hostname "command1 && command2 && command3 [...]"

 

what if i already use " and ' ?

 

Escape your own special characters by placing a '\' in front of each to be escaped character, so something like

Code:

ssh user@hostname "command1 --arg1 \"xx\" && command2 && command3 [...]"

 

didn't work for me for some reason before but not it did

 

You can do if/for ect.. statements on one line by separating statements with a semi-colon

Code:

 if [ -f tmp.txt ] ;then echo "yep.. that is a file";fi

same thing when doing a for statement on one line.

Code:

for i in 1 2 3; do echo $i;done