Expression Commands
All commands here are of the form "command other-command other-command-args". They run
the "other-command" in the context of the given primary command.
- bg other-command
- run command in the background.
- priv other-command
- run the command as the system's root identity.
- repeat n other-command
- repeat other-command n times.
- sort other-command
- run other-command and sort it's output.