Redhat: Modify user
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 name