How To Create A New Sudo User On Ubuntu 20.04
How do you create a new user with sudo
privileges on a Ubuntu 20.04 machine?
On Unix-like operating systems, sudo
allows users to run programs with the same security privileges given to the superuser
(also known as root
, administrator
, admin
, or supervisor
). It originally meant "superuser do" because sudo
was invented to run commands only as the superuser on older versions of Linux.
By giving a user on your machine sudo
privileges, that user can execute commands and run programs with root
or administrative
permissions. You must be careful with this because many of the commands and programs that require that level of permissions can have harmful and/or malicious side effects on your machine.
In this article, we'll walk you through how to create a new user on your Ubuntu 20.04 machine and configure the user to have sudo
privileges. And we'll also cover how to remove a user's sudo
permissions if you ever have the need.
Let's get started!
Table Of Contents
- Create A New User
- Add Your New User To The Sudo Group
- Test Your User's Sudo Access
- Remove Your User's Sudo Privileges
Create A New User
First, let's add a new user to your machine.
You can do that with this command (replace bob
with the username you want to use):
adduser bob
You'll be prompted to set the password for your new user and also confirm it by retyping the value:
New password:
Retype new password:
passwd: password updated successfully
Next, you'll be prompted to set some information for your new user. You can fill them out or just press ENTER
repeatedly to skip each one.
Changing the user information for bob
Enter the new value, or press ENTER for the default
Full Name []:
Room Number []:
Work Phone []:
Home Phone []:
Other []:
Is the information correct? [Y/n]
Your new user is now created!
Add Your New User To The Sudo Group
Now that you have a new user, you can add it to the sudo
group and, therefore, give it sudo
privileges.
Use this command to add your user to the sudo
group:
usermod -aG sudo bob
Your user is now part of the sudo
group!
Test Your User's Sudo Access
Let's run a quick test command to verify that your user's new sudo
permissions are working correctly.
First, switch from the root
user to your new user with this command:
su - bob
As your new user, you can run a sudo
privileged command by prepending sudo
to the command you wish to execute with superuser permission.
It would look something like this:
sudo command_you_want_to_run
To serve as an example, let's list out the contents of the /root
directory. This directory is normally only accessible to the root
user.
sudo ls -la /root
Since this is the first time you've used the sudo
command in a session, you'll be prompted to enter the password for your sudo-enabled user:
[sudo] password for bob:
If you entered the correct password and your user is in the sudo
group, the sudo
command will be successfully run with root
privileges.
Remove Your User's Sudo Privileges
In the future, you may need to remove a user's sudo
privileges for one reason or another.
To do this, you can use this command:
deluser bob sudo
This will only take sudo
access away from the user profile and will not delete the user itself.
Let's test whether or not the user has been removed from the sudo
group.
First, switch over and use your user:
su - bob
And retry the same command from the last section that lists the contents of the /root
directory:
sudo ls -la /root
This command should fail and output something similar:
bob is not in the sudoers file. This incident will be reported.
If the command was successful, make sure you have removed the user from the sudo
group.
Conclusion
In this article, we went over how to create a new user, give it sudo
privileges by adding it to the sudo
group, and remove a user from the sudo
group if you ever need to do so.
Thanks for reading and happy coding!