Bash "nohup"s Background Jobs

In the old days, if you had a background job running, and you accidentally killed your terminal window, the job was killed with it. A special command, nohup ("no hangup"), would prevent this; it detached the job from the terminal's process group.

You can still find /usr/bin/nohup, but bash now automatically nohups all background jobs. Try this from a new terminal window:

$ { sleep 20; echo DONE > /tmp/OUT; } & sleep 1; exit

The window will die, but if you look in another window (or, after 20 seconds, in /tmp/OUT), you'll see the backgrounded job continues.

I say this because I still see admonitions to nohup jobs.