Running one command on 30 servers: what we learned building fleet commands

"Run apt upgrade everywhere" sounds simple. In practice:

• a few servers are offline

• one hangs on a prompt

• another one has a different distro

In Servor, a fleet command fans out to every server you select. Each server gets its own signature, and results come back separately for each one, so you can tell straight away which servers failed and why. Commands you run often can be saved as recipes and replayed on any group.

What's the command you run most across all your servers?