I sometimes use ssh to run multiple commands on a remote host like this:
ssh my_user@my_host "command1; command2"
utilizing double quotes to send both commands to the remote machine.
Now I would like to access an environment variable in one or both of the commands.
Here is a simplified example that illustrates what I have tried:
ssh my_user@my_host "echo $USER; echo $HOSTNAME"
This echos my user/hostname on the local machine, whereas I would like to see the names on the remote machine instead.
Using single quotes I can achieve what I want for a single command as follows:
ssh my_user@my_host echo '$USER'
but I don’t get the behavior I want when I use single quotes inside the double quotes like this:
ssh my_user@my_host "echo '$USER'; echo '$HOSTNAME'"
How can I get the behavior I want with both commands being executed from a single ssh commmand?
(Please note that my actual commands are more complicated… I do realize that I can get both variables in a single command for my toy example as below, but this does not solve my real problem):
ssh my_user@my_host echo '$USER' '$HOST'
>Solution :
Just escape the $ using \.
ssh my_user@my_host "echo \$USER; echo \$HOSTNAME"