Repeat command automatically in Linux

Question

Is it possible in Linux command line to have a command repeat every n seconds?

Say, I have an import running, and I am doing

ls -l
         


        

Answer 1

To minimize drift more easily, use:

while :; do sleep 1m & some-command; wait; done

there will still be a tiny amount of drift due to bash's time to run the loop structure and the sleep command to actually execute.

hint: ':' evals to 0 ie true.