I am quite confused regarding this matter.
As far as I know the user root has all the privelages.
Also all the users of the group sudo has all privelages.
But the user root by default is not a member of the group sudo. Then how can the user root be sudo user?
Please explain the entire concept to me.
To be noted the commands mentioned below produces the output mentioned below:
$root@lenovo:/home/rancho# compgen -u
-----
-----
root
rancho
-----
-----
$root@lenovo:/home/rancho# compgen -g
-----
-----
root
rancho
sudo
-----
-----
$root@lenovo:/home/rancho# getent group sudo
sudo:x:27:rancho
$root@lenovo:/home/rancho# getent group root
root:x:0
$root@lenovo:/home/rancho# visudo
#
# This file MUST be edited with the 'visudo' command as root.
#
# Please consider adding local content in /etc/sudoers.d/ instead of
# directly modifying this file.
#
# See the man page for details on how to write a sudoers file.
#
Defaults rootpw
Defaults env_reset
Defaults mail_badpass
Defaults secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
# Host alias specification
# User alias specification
# Cmnd alias specification
# User privilege specification
root ALL=(ALL:ALL) ALL
# Members of the admin group may gain root privileges
%admin ALL=(ALL) ALL
# Allow members of group sudo to execute any command
%sudo ALL=(ALL:ALL) ALL
# See sudoers(5) for more information on "#include" directives:
#includedir /etc/sudoers.d
:x
$root@lenovo:/home/rancho#