[Linux] Add new sudo user & assign folder owner

1. add a new user

sudo adduser <admin_user_name>

2. set new user to be admin

sudo usermod -aG sudo <admin_user_name>
su - <admin_user_name>

3.  create new folder & change premission

sudo mkdir -p /var/www/ghost
sudo chown <admin_user_name>:<admin_user_name> /var/www/ghost
sudo chmod 775 /var/www/ghost