This plug-in is outdated. Please use Secure Settings by intangibleObject instead. It has a lot more features, and it's actively maintained. If you really need the Locale Execute Plug-In for some obscure reason, you can still download it from here.
With this plug-in you can use Locale to execute a Linux command.
You can use these prefix characters:
For example you can use it to start QuickSSHd with this command:
This works with QuickSSHd 2.0.3 or later, which is in the market now, since 2010-08-13.
It's in a form field here, so you (and I) can easily copy and paste it.
The two icons used in this plug-in were released by Everaldo Coelho and YellowIcon under the LGPL. See here for more info.