I can think of one. It is so small I do not know if it counts. When I run a command that takes long, I run it (I use fish but any shell has an equivalent) like

I can think of one. It is so small I do not know if it counts. When I run a command that takes long, I run it (I use fish but any shell has an equivalent) like: ./mycommand && beep or ./mycomand && play something.wav It can be useful If I am doing something else on the computer or outside of it. It saves time from checking over and over if the command finished.