Monitor things with CLI

I use to ls or df repeatly to monitor some status. Then I come with the for loop of each shell I use... but it's really painful to change the syntax every time...

Finally I wrote a small script python that work on linux and windows

! /usr/bin/python

import os
import sys
import time

cmd = " ".join(sys.argv[1:])
clear = ['clear','cls'][os.name == 'nt']

while True:
    try:
        os.system(clear)
        os.system(cmd)
        time.sleep(1)
    except KeyboardInterrupt:
        break

Once you have put this script in your PATH, you just need to run monitor ls -al (the script name is monitor) to see the result of ls refreshed every second.

And press Ctrl + c to interrupt the program