There's a couple of places (naturally). It's easy to be fooled and think: "anybody can type man man". But in all fairness, you need to figure out which man page to look into, or what command to run and sometimes it's just a blank. In RHEL there is /usr/share …

Ever had to read a man page on a Solaris system? You'll see these SunOS 5.11 System Administration Commands on each page in the manpage, making it quite hard to read. To make it more readable you can run this: man $1|grep -v 'SunOS 5.11'|grep -v …