this post was submitted on 16 Feb 2024
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Happened to me in work once... I was connected via SSH to one of our test machines, so I could test connection disruption handling on a product we had installed.
I had a script that added iptables rules to block all ports for 30 seconds then unblock them. Of course I didn't add an exception for port 22, and I didn't run it with nohup, so when I ran the script it blocked the ports, which locked me out of SSH access, and the script stopped running when the SSH session ended so never unblocked the ports. I just sat there in awe of my stupidity.
tmuxAlways use tmux when possible for remote connections.
What does it do in this case?
Well, the script could keep running even after he would have detached from that tmux session due to losing ssh connection. And since that script would unblock all ports after 30 seconds...
(Same use case as nohup that they mentioned)
Tmux essentially creates a pseudo-shell that persists between sessions.
So you can start a process, detach the session, start something else, disconnect, come back next week, and check on it.
It does other things too. Like console tiling.