Hey, EMACS: First parameter, NAME, should be all caps Second parameter, SECTION, should be 1-8, maybe w/ subsection other parameters are allowed: see man(7), man(1)
NAMEcheckgid - checks the gid
DESCRIPTIONThis manual page documents briefly the checkgid command.
checkgid is a program that checks whether it can setgid to the group specified. This is to see if it is a valid group for apache2 to use at runtime. If the user (should be run as superuser) is in that group, or can setgid to it, it will return 0.