SSH in to your server as the root user:
ssh root@your_server_ip_addressUse the adduser command to add a new user to your system:
adduser sammyBe sure to replace sammy with the username that you want to create. You will be prompted to create and verify a password for the user:
OutputEnter new UNIX password:
Retype new UNIX password:
passwd: password updated successfullyNext, you’ll be asked to fill in some information about the new user. It is fine to accept the defaults and leave this information blank:
OutputChanging the user information for sammy
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]Use the usermod command to add the user to the sudo group:
usermod -aG sudo sammyAgain, be sure to replace sammy with the username you just added. By default on Ubuntu, all members of the sudo group have full sudo privileges.
sudo AccessTo test that the new sudo permissions are working, first use the su command to switch to the new user account:
su - sammyAs the new user, verify that you can use sudo by prepending sudo to the command that you want to run with superuser privileges:
sudo command_to_runFor example, you can list the contents of the /root directory, which is normally only accessible to the root user:
sudo ls -la /rootThe first time you use sudo in a session, you will be prompted for the password of that user’s account. Enter the password to proceed:
Output:[sudo] password for sammy:Note: This is not asking for the root password! Enter the password of the sudo-enabled user you just created.
If your user is in the proper group and you entered the password correctly, the command that you issued with sudo will run with root privileges.
In this tutorial, we created a new user account and added it to the sudo group to enable sudo access.