HOW TO GIVE SUDO ROOT ACCESS TO USER

make a backup of /etc/sudoers file

cp /etc/sudoers /tmp/sudoers.date

Then edit the /etc/sudoers file  here we can edit in 2 ways

1:- vi /etc/sudoers
or
2:- visudo

visudo is the recomandded to edit the sudoers file
here you go

# visudo
add below enterie  ( " suppose you need to give sudo access to ramesh" ) here what you need to add

ramesh ALL=(root) NOPASSWD: ALL

:wq!

to get root access login with your user id then do

#sudo su -

will get root access