To add a new user run this command
adduser newuser
for example :-
root@myserver:~# adduser limiteduser
Adding user `newuser' ...
Adding new group `newuser' (1000) ...
Adding new user `newuser' (1000) with group `newuser' ...
Creating home directory `/home/newuser' ...
Copying files from `/etc/skel' ...
You will be asked to choose a password for the user
New password:testaccount
Retype new password:testaccount
passwd: password updated successfully
Changing the user information for limiteduser
You will ten be asked for some additional information about he new user , i just Presses enter for default u can enter whatever u wish
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]
You Have now successfully created a new user
If you want to make this user a sudo user read this article
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