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4.1 User Accounts
Like other
multiuser operating systems, such as Windows NT/2000/XP, Linux uses
user accounts to identify users and allocate permissions. Every Linux
system has a special user known as the root
user. The
root user is analogous to the Windows user known as Administrator.
The root user can perform privileged operations
that are forbidden to other users. For instance, only the root user
can perform most system administration operations. By default, the
username associated with the root user is
root.
You should be judicious in your use of the root account. For
instance, you should safeguard the associated password so that no one
uses it to compromise your system. Also, you should log in as the
root user only when performing privileged operations. Following this
advice will help you avoid disasters such as accidentally deleting
important files that are protected against access by ordinary,
non-root users.
