debian add user to sudoers code example

Example 1: add sudo user ubuntu

# add a user and set a password
adduser USERNAME

# add user to sudoers / sudo groupe with command below
usermod -aG sudo USERNAME

Example 2: add user to sudoers debian

usermod -aG sudo username

Example 3: grant superuser permission to sudo user ubuntu

adduser sudo_user_name
//grant privileges
visudo
under line 
root ALL=(ALL:ALL) ALL 
add this line
sudo_user_name ALL=(ALL:ALL) ALL
sudo apt-get update