In this guide, we want to teach you to How To Fix the Error User Not in Sudoer File on Ubuntu. When you want to run Linux Commands with sudo privileges on your Ubuntu server, you may get this error that said User Not in Sudoer File. This will happen when the sudo user is not in the sudo group on your Ubuntu server. You can follow the steps below to fix it.
How To Fix Error User Not in Sudoer File on Ubuntu?
To complete this guide, you must have access to your server as a root user.
Then, follow the steps below to fix this error.
Step 1 – Create a non-root User on Ubuntu
First, we will create a non-root user to show you how it will happen. To do this, run the command below:
Enter a password for your user:
Adding user `orcacore' ...
Adding new group `orcacore' (1000) ...
Adding new user `orcacore' (1000) with group `orcacore' ...
Creating home directory `/home/orcacore' ...
Copying files from `/etc/skel' ...
Retype new password:
passwd: password updated successfully
Changing the user information for orcacore
Enter the new value, or press ENTER for the default
Full Name :
Room Number :
Work Phone :
Home Phone :
Is the information correct? [Y/n] y
Now switch to your user account with the following command:
su - orcacore
Step 2 – Fix User Not in Sudoers File Error on Ubuntu
At this point, when you want to try to run the sudo commands with your user, you will get the following error:
[sudo] password for orcacore:
orcacore is not in the sudoers file. This incident will be reported.
To fix this error, you must add your user to the correct group. In Ubuntu servers, you just add the user to the sudo group.
To do this, switch back to your root account with the following command:
Enter your root password and press enter.
Then, use the following command to add your user in the sudoers file:
usermod -aG sudo orcacore
To apply the changes, reboot your Ubuntu server with the command below:
Step 3 – Verify that the User is in the Sudoers File
When you logged back to your server, switch to your user account again:
su - orcacore
You will see the following output:
To run a command as administrator (user "root"), use "sudo <command>".
See "man sudo_root" for details.
This means that you have added your user to the sudoers file correctly.
At this point, you have learned How To Fix the Error User Not in Sudoer File on Ubuntu. As you saw, it will happen when your user is not in the correct sudo group.
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