Fine advice overall. Except: Don't put suffixes on command names. Don't. It's a DOS thing that has no meaning in Unix. It confuses users. It breaks hiding

Fine advice overall. Except: Don't put suffixes on command names. Don't. It's a DOS thing that has no meaning in Unix. It confuses users. It breaks hiding implementation details. It encourages users to do the wrong thing. It makes changing what language a script's in have a ripple effect of breakage across everything else that uses it. Don't do it.