Prevent your laptop from sleep/suspend while something important is running…

The problem§

My laptop is configured to go to sleep after two minutes of being idle.

But it also suspends while a backup to an external disk is running :(

The solution§

The solution is to tell your system that something important is running and that it should not go to sleep/suspend or to shut down.

With systemd you can use the command „systemd-inhibit“. Read the man page… (man systemd-inhibit).