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How to add a user to the group on linux

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The concept of “group” may be confusing to many Linux users. Linux operating system is designed to allow more than one user to have access to the Linux system at a time. Linux/Unix operating systems provides multitasking abilities to its multi-users. In order to do this task, we need to assign a group to each Linux user. This article gives step by step process on – how to add a user to the group in Linux system.

Create a New User

To create a new user using Linux command line, use the following command –

$ sudo useradd tutorialspoint

The above command is used to create a tutorialspoint user to the Linux system.To see the user list, use the following command –

$ awk -F':' '{ print $1}' /etc/passwd

A sample output will be as below –

.......
syslog
messagebus
usbmux
dnsmasq
avahi-autoipd
kernoops
rtkit
saned
whoopsie
speech-dispatcher
avahi
lightdm
colord
hplip
pulse
linux
gitlog
gitdaemon
tutorialspoint

For example, in the above result, you can see that tutorialspoint user is created.

Add a New Group

To add a new group in Linux, use the following command –

$ sudo groupadd editors

In the above command ,It is creates a group called editors.

Adding an Existing User to a Group

For adding tutorialspoint user to the editors group, use the following command –

$ sudo usermod -a -G editors tutorialspoint

Change a User’s Primary Group

To change the user’s primary group, use the following command –

$ sudo usermod -g linux tutorialspoint

In the above command, assign tutorialspoint user to linux group.

View a User’s Group Assignments

If you’re trying to figure out permissions assigned to a user, then you have to use the id command to see a group which is linked with the particular user. The following is the command line –

$ id tutorialspoint

The sample output will be like this –

uid=1001(tutorialspoint) gid=1000(linux) groups=1000(linux),1002(editors)

Adding a New User and Assigning a Group (through a single command)

Sometimes, you may need to create a user which should have specific accessible rights or directories, then in these cases, use the following command to create a new user and assign a group as below –

$ sudo useradd -g linux john

The above command creates a user called john and which will be added to the linux group. Use the following command to assign a password to john user –

$ sudo passwd john

The sample output should be like this –

linux@linux:~$ sudo passwd john
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully

Adding a User to Multiple Groups

For example, you might be required to add a user to multiple groups. To do this, use the following command –

$ sudo usermod -a -G linux,editors tutorialspoint

The above command turialspoint user is added to the linux and editors  groups.

Congratulations! Now, you know “How to add a User to the Group on Linux”. We’ll learn more about these type of commands in our next Linux post. Keep reading!

raja
Samual Sam
Updated on 21-Oct-2019 11:44:54

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