$ curl cheat.sh/
# a2ensite
# Enable an Apache virtual host on Debian-based OSes.
# More information: <https://manpages.debian.org/latest/apache2/a2ensite.8.en.html>.

# Enable a virtual host:
sudo a2ensite virtual_host

# Don't show informative messages:
sudo a2ensite --quiet virtual_host

$
Follow @igor_chubin cheat.sh tldr