user is not in the sudoers file. This incident will be reported.
you need to edit visudo file
so you need to use this command on normal user to switch
account to root user command is:-
su -
now enter root password
now you are switched to root user
now enter visudo command to edit sudoers file
now serach this line:-
#Allow members of group sudo to execute any command
and after %sudo
enter
username ALL=(ALL:ALL) ALL
now you are all set
now click esc button on the top left side of your keyboard and click
:wq and hit enter
now goto normal user run any sudo command now you need to enter normal user command to run super user do (sudo)command