Linux Usermod Command To Modify User Details

Linux Usermod Command To Modify User Details

In this tutorial we will learn the Linux Usermod Command to modify User Details.

usermod is used for changing user info. You can change your login shell, userid, username, homedir, etc.

I like this command because it’s syntax is similar to useradd’s:

$ usermod [options] username

1. Change the user login shell: usermod -s

$ grep anakin /etc/passwd
anakin:x:1006:1008:Anakin Skywalker:/home/anakin:/bin/bash
$ sudo usermod -s /bin/zsh anakin
$ grep anakin /etc/passwd
anakin:x:1006:1008:Anakin Skywalker:/home/anakin:/bin/zsh

The login shell can be changed also with the chsh command:

$ sudo chsh -s /bin/sh anakin
$ grep anakin /etc/passwd
$ anakin:x:1006:1008:Anakin Skywalker:/home/anakin:/bin/sh

2. Change the user id (UID): usermod – u

$ id xavier
uid=1014(xavier) gid=1016(xavier) groups=1016(xavier)
$ sudo usermod -u 1050 xavier
$ id xavier
uid=1050(xavier) gid=1016(xavier) groups=1016(xavier)

3. Change the user homedir: usermod -m -d

-d is for setting the homedir and -m is for creating the dir if it does not exist.

$ finger xavier | grep -i dir
Directory: /home/xmen Shell: /bin/bash
$ sudo usermod -m -d /home/profx xavier
$ finger xavier | grep -i dir
Directory: /home/profx Shell: /bin/bash

4. Add a user to a group with usermod:

How to add a user to a primary (existing) group: usermod -g.
$ groups xavier
storm : storm

So, storm’s primary group is storm. Now, I will change it to xmen:
$ sudo usermod -g xmen storm
$ groups storm
storm : xmen

Adding a user to secondary groups:
$ sudo usermod -G superhero,preetygirl storm
$ groups storm
storm : xmen superhero preetygirl

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Linux Usermod Command To Modify User Details
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