Muscle can help you to start, stop, startUI and restart images in *nix systems. It needs crab.How to load: take a fresh pharo image and load muscle (and crab and requisites) with this: Gofer it wiresong: 'mc'; package: 'Filesystem'; load. Gofer it squeaksource: 'OSProcess'; package: 'OSProcess'; load. Gofer it squeaksource: 'CommandShell'; package: 'CommandShell'; load. Gofer it squeaksource: 'crab'; package: 'FilesystemExtensions'; package: 'crab'; load. Gofer it squeaksource: 'muscle'; package: 'muscle'; load.How to use it: this an example for appWorker1.st: [:command| Muscle this username: 'noob'; vm: '/your/path/to/squeak'; image: 'your/path/to/your/appWorker1.image'; ram: '200m'; action: command; doIt ] So, you can do in a terminal these things: sudo crab.sh appWorker1.st stop sudo crab.sh appWorker1.st start sudo crab.sh appWorker1.st restart or sudo crab.sh appWorker1.st startUI The sweet thing is when you use that automagically with some monitoring software (like monit).