deleted the only sudoer user by mistake
3716
How do I add myself back as a sudo user?
4746
How to solve "permission denied" when using sudo with redirection in Bash?
129130
How to NOT become a root user? Are administrators root?
73466
How to solve "sudo: /etc/sudoers.d is world writable"
107135
Deleting another user's directories from my own
56480
sudo: /var/lib/sudo writable by non-owner (040777), should be mode 0700
1983
Can sudo be reinstalled after being removed?
17398
Why a non-root user can delete files created by root?
111046
sudo: /var/lib/sudo/navneet writable by non-owner (040777), should be mode 0700
149141
What happens if you do sudo passwd without specifying a user?
130030
Run a specific sudo command without a password in Ubuntu 13.10
15255
How can I add a new user as sudoer using the command line?
44231
Remove sudo privileges from a user (without deleting the user)
8625
/usr/bin/sudo must be owned by uid 0 and have the setuid bit set
27714
How do I drop root privileges in shell scripts?
131429
Why can't sudo find a command after I added it to PATH?
123781
This command can only be used by root