Adding User to Groups
Let’s add irfan to the admins group using:
usermod -aG admins irfan
However, if attempted as irfan, it’ll generate an error. So, first, let’s make irfan a sudo user. Log in as root and execute:
usermod -aG sudo irfan
After adding to the group, verify user groups with:
groups irfan
Now, irfan is a sudo user. Let’s add them to the admin group. First, create the admins group:
sudo groupadd admins
Then, add irfan to the group:
usermod -aG admins irfan
To add irfan to multiple groups, use:
usermod -aG admins,sudo irfan
Verify group addition with:
groups irfan
This user will be effective in the groups, After signing out or the next login.
Changing Home Directory
To change the home directory path for the user irfan:
sudo usermod -d /home/myhome --move-home irfan
Verify changes post-login with:
pwd echo $HOME
Changing Username
To change irfan’s username to learnwithirfan:
usermod -l learnwithirfan irfan
Verify the change using:
cat /etc/passwd
Managing Account Status
To disable the user account:
usermod -L learnwithirfan
To enable the user account again:
usermod -U learnwithirfan
To set an expiration date for the account:
usermod learnwitirfan -e 2024-12-30
Verify changes using change:
chage -l learnwithirfan
