Gentoo Logo   3. Gentoo/Alt Technotes Guide   3.a. General
Structure  Handling Users  There are differences between users
in a Gentoo/Linux system and the ones in other Gentoo/Alt
systems. These differences are usually a side problem that does
not invalidate most of the work. Still, it's better to pay
attention.  The first thing to check is to never use the root
group. The group with id 0, called root on Linux is instead
wheel on BSD and Darwin, (and probably other classical unices);
while wheel group on Linux has GID 10. When you need to set the
default permissions on a file (or a series of files), you should
then use the command chown root:0 file instead, so that it takes
the right permissions.  Important: This is the only one case
where you should refer to a group or an user with its numeric ID
instead of the name.  For every other case you should always use
the name of groups and users, avoiding specifying them by ID as
they can have different IDs on different systems.  Also, it's
important to note that e