Redhat: Modify user
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Usermod
Once a user is created various setting may need to be updated or changed. This is done with the usermod command.
usermod -e 2013-06-08 <username> #change the expiration date
usermod -G <group> <username> #add user to group| -aG <group> | appends to exisiting group |
| -l <new username> | set new username |
| -L | Lock Password |
| -U | Unlock Password |
Groupmod
The groupmod command only as two practical uses: change the group ID or change the group name.
groupmod -g <newid> <groupname>
groupmod <oldname> <newname> #chnage the grouop namechage
The chage (change age) command is used to modify the age information of a password.
| -d <date> | Set the last change date for the password |
| -E <date> | assign an expiration date |
| -I <num> | Locks account num days after password expiration |
| -l | lists aging information |
| -m | set minium days user must keep password |
| -M <num> | set maximum number of days user can keep password |
| -W <num> | specifies days before expiration that the user is warned. |