Install sudo by entering the following commands in the terminal:
sudo apt update sudo apt install sudo
Description:
Provide limited super user privileges to specific users
Sudo is a program designed to allow a sysadmin to give limited root privileges to users and log root activity. The basic philosophy is to give as few privileges as possible but still allow people to get their work done. . This version is built with minimal shared library dependencies, use the sudo-ldap package instead if you need LDAP support for sudoers.
Homepage: http://www.sudo.ws/
Version: 1.8.21p2-3ubuntu1
Section: admin