Applescript for Terminal Commands

The 'ssh' command takes an optional "command" argument and runs this command on the remote computer. You could use this to run whatever command you wanted on the various computers simply by invoking the 'ssh' in sequence in a script.

But please note that repairing permissions is not something that needs to be done as a regular maintenance task on OS X. You should only do it when something is not working and you suspect it might be a permission issue.