[vaishaksuresh]

I've opened 200+ panes across 3 monitors, broadcast to all of them to update a configuration and saved. That saved me a lot of time, either building automation or ssh-ing to all of them one by one.

I don't know an easy way to do it in Terminal.app

[hungryhobo]

Sounds like something ansible would be perfect for

[sixstringtheory]

Just to add to the options from your other replies, check out dsh: https://manpages.ubuntu.com/manpages/xenial/en/man1/dsh.1.ht...

[0x0]

csshX can do something like this with Terminal.app