Search notes:

/etc/passwd

User account information: each line represents a user and is colon-separated with the following fields:
username
password nowadays usually x, see /etc/shadow
user id
default group id See /etc/group
gecos
The user's home directory
The shell The name of the program to be run when a user logs in, usually a shell.
In order to prohibit a user from logging in, the programm to be launched (7) might be set to /bin/false
The file should be edited with vipw.

See also

/etc/group
Shell commands
/usr/share/doc/base-passwd/users-and-groups.txt.gz

Index

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