informIT: Linux Administration and Configuration for the Novell CLE Exam

“Recall from earlier discussions that Linux is a multiuser
operating system. When you installed your SUSE Linux server, you
created two users: root and student. You could also create many
other users. Depending on how the system is utilized, you could
even have dozens or even hundreds of users.

“This is a very powerful aspect of Linux, but it also presents
some problems. Suppose you have four users on your system–root,
Kimberly, Josh, and Jessica–and each user had full access to all
the files on the system. Kimberly uses the Linux system to edit
digital video, which involves using very large files. Josh uses the
system to prepare reports and spreadsheets–very small files in
comparison to Kimberly’s…”