Little suggestions

[labynocle]

First thanks for your work ! Your script is very useful, easy and quick to use.

I just patched it with tiny things:

• more reliable ps command
• the script will not exit with a 0 status when there is an unexpected result
• change the usage output (because I change the name of the script, and the "fix" path could be confusing)

Hope this will help and improve the script

[ralyodio]

Thanks for the fixes.