Cedant web hosting - Managing Users and Groups User management is a
Managing Users and Groups User management is a cornerstone activity for the healthy upkeep of a system. For security purposes, management should be limited to a few users who need to administer accounts. There are three main user administration files: . /etc/passwd Identifies the authorized accounts for the system. . /etc/shadow Holds the encrypted password of the corresponding account. Most Unix systems have this file. . /etc/group Contains information on group accounts. /etc/passwd The first and the most important administration file is /etc/passwd. This file holds the majority of information about accounts on the Unix system. Almost anyone with an account on the system can view the file, but only root can modify it. Figure 3-1 shows a sample /etc/passwd file from a Linux machine. Figure 3-1 Figure 3-2 shows an /etc/passwd file from a Solaris 10 system. It s nearly identical to the file shown in Figure 3-1 because the format is the same among the various Unix systems. 31 Understanding Users and Groups
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