% nginx

# Enable site
ln -s /etc/nginx/sites-available/<ls_site> /etc/nginx/sites-enabled/<ls_site>

# Disable site
rm /etc/nginx/sites-enabled/<rm_site>

$ ls_site: ls /etc/nginx/sites-available/ | awk '{print $1}'
$ rm_site: ls /etc/nginx/sites-available/ | awk '{print $1}'