Links
- http://freshtutorial.com/add-users-groups-change-password-linux-terminal/
- http://webtools.live2support.com/linux/passwd.php
/etc/passwd#
- contains all Users
- Benutzer:Passwort:User-ID:Group-ID:Kommentar:home-Verzeichnis:Shell
- there is a shadow file under /etc/shadow
/etc/group#
- contains all groups
Editing the files above is not suggested, use following commands to maintain users and groups
who who -a users w cat /etc/passwd cat /etc/group usermod -G deploy,root root usermod -a -G groupname username usermod -d /path/to/new/homedir/ username useradd chown -R <user> *|change owner for whole subfolder chmod <rights> <file>|x=1 w=2 r=4, oga = owner group all chgrp adduser username passwd username addgroup groupname userdel username deluser user group groupdel groupname vipw -s : Edit /etc/passwd file vigr -s : Edit /etc/group file
| chage | change user password expiry information |
chage -l username chage -E 03/31/2014 -m 5 -M 90 -I 30 -W 14 username
Lock/Unlock user
| passwd -l <username> | Lock user |
| passwd -u <username> | Unlock user |
| passwd -a -S | Show list |
List columns:
| 1 | login name |
| 2 | locked password (L) / has no password (NP) usable password (P). |
| 3 | date of the last password change |
| 4-7 | password: minimum age, maximum age, warning period, inactivity period in days |