In this post, I’m gonna show you how to allow users to run sudo command without password in Linux
Prerequisites
In order to do this, you will need the following:
1. root/sudo privileges on the machine
2. A non-admin user. Check this post for the steps to create a user in Linux.
We can do this with two methods.
Method 1:- Adding the user to a group and give permission to the group
Create a group using the groupadd command. I’m gonna create a group with name avengerssudo groupadd avengers
I’m gonna add the user jarvis into the group avengerssudo usermod -a -G avengers jarvis
Now, add the following entry in /etc/sudoers file
%avengers ALL=(ALL:ALL) NOPASSWD: ALL
The file will look like the following image
Save and exit from the editor. The user will be able to run sudo command without password
If you want to limit the group access to a specific command, add the command with full path
%avengers ALL=(ALL:ALL) NOPASSWD: /usr/bin/docker
You can get the absolute path to the command binary file using which command
$ which docker
/usr/bin/docker
If you want to give access to multiple commands, you can add them as command separated values.
%avengers ALL=(ALL:ALL) NOPASSWD: /usr/bin/docker, /usr/sbin/visudo
Method 2: Add permission to the user directly in sudoers file
Run the following command in the terminal
visudo
This will open the file /etc/sudoers with the default editor. In most cases, it will be in nano editor
You can also open it manually using vim or nano. I’m gonna use vim herevim /etc/sudoers
Now you will see something like this.
Just add that line like this
jarvis ALL=(ALL:ALL) NOPASSWD: /usr/bin/docker, /usr/sbin/visudo
Save and exit the editor. The user will be able to run visudo and docker without entering the password.
You can check the privileges of the user by running the following command.
sudo -l
