User Administration in Linux
Syntax: useradd <username>
Configuration File: /etc/passwd
User Administration with customization
Syntax: useradd <option> <argument> <username>
Options:
u - UID
g - GID
c - Comment
d - home directory
b - base directory
-e account expiry
-o non unique
-G make member of secondary group
-r system user
-s user login shell
User modification
Syntax: usermod <option> <argument> <username>
Options:
u - UID
g - GID
c - Comment
d - home directory
b - base directory
-e account expiry
-o non unique
-G make member of secondary group
-r system user
-s user login shell
User password management
Syntax: passwd <username>
chpasswd
Configuration file: /etc/shadow
Group Administration
Syntax: groupadd <groupname>
Configuration file: /etc/groups
User account delete and group delete
Syntax: userdel -r <username>
Syntax: groupdel -r <groupname>
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