adduserprivilegesuser-management
I added a user named "admin" to my Ubuntu 14.04LTS server, using adduser.
I'm used to having to add a user to the /etc/sudoers file when adding a new user that needs sudo privileges, but this time I didn't. It doesn't appear the 'admin' user existed before I created it, based on the output in the shell. Why did this work this way?
Just add the user to the sudo group:
sudo adduser <username> sudo
The change will take effect the next time the user logs in.
This works because /etc/sudoers is pre-configured to grant permissions to all members of this group (You should not have to make any changes to this):
# Allow members of group sudo to execute any command
%sudo ALL=(ALL:ALL) ALL
As long as you have access to a user that is in the same groups as your "original" user, you can delete the old one.
Realistically, there are also other groups your new user should be a member of. If you set the Account type of a user to Administrator in Users Settings, it will be placed in at least all of these groups:
adm sudo lpadmin sambashare
Because your system configuration may vary, I suggest taking a look at the output of groups <username> to see what groups are normally in use.
Best Answer
By default
adduseradds every new user to a group with the same name as the user's (the group is created if it doesn't already exists). So if you create a user calledadminit will be added to the groupadmin./etc/sudoerscontains the linewhich means that all members of the group
adminare allowed to usesudo- and that's true for youradminuser, too.