Gewähren
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
Nariman
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