I want to run certain daemons as 'non-real' users like 'sendmail'. The su(1) man page I can do something like: su bin -c makewhatis But either the example is bogus, or the bin user had a real shell at some point. A currently shipping installation has /sbin/nologin as it's shell. So how do I do something like this from /etc/rc without giving 'bin' a real shell?