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I am implementing an automated backup scheme so I created a shell script which first creates SQL dumps for all MySQL databases, then retrieves all websites from the /var/www directory of a remote server. The latter is working as I am using rsync to get the remote files.

However, the MySQL dumps being retrieved are the ones from the local server which is not what I want. I want to get the SQL dumps from the remote server as well.

I have a tunnel between the local and remote server which I can connect to without using any password (I added the public key to the authorized_hosts), so I tried to add the following code to the script:

ssh user@192.168.x.xxx

I then attempted to retrieve the SQL dumps and exited from the remote server. However this does not work as I still have to enter exit manually in the terminal for the SQL dumps to be retrieved from the remote host. I don't know why this is happening. This is what the script is trying to do:

//connect to remote server 
ssh user@192.168.x.xxx

//retrieve SQL dumps 
//code to retrieve...

//exit from remote server 

//use rsync to get remote files of /var/www from local server (working)

Is there a way to connect to the remote host AND run the script's code on THAT remote host?

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2 Answers 2

up vote 4 down vote accepted

Just add the command you want to run to the end of the ssh command line. So something like this:

ssh user@192.168.x.xxx /path/to/script

will run /path/to/script on the remote machine.

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So simple! yet I couldn't find it! Thanks a lot! –  seedeg Jun 30 '11 at 8:24

If it's one command, use ssh user@host remotecommand. For example:

ssh user@dbhost "mysqldump" > dumpfile

Note that redirections take place locally (unless you put them inside quotes), so dumpfile will be created on the local computer.

The remotecommand argument is in fact passed to the default shell of user, so you can use stuff like a; b && c and if/while statements. But it's wiser to put them in a second script file instead (in the db server).

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