I don't think this is an appropriate "proficiency". The BSDs ship with several shells. Any one of them might be the "default". If I can bang out a script for /bin/sh, why should I bother to learn anything about csh? And, please, don't tell me I'll have to debug someone else's csh script, not in 2006. Not before Perl, sed and awk, surely.

You can't do much on NetBSD at any rate without knowing your way around /bin/sh. You can happily use and administer the system with only that, if you install bash.

Dear anonymous: http://submit.bsdcertification.org/contact --KevinDKinsey