apache2
========

check ip address
==============
hostname -I

check status of port 80
===================
netstat | grep :80

create virtual host for multiple domains
================================
sudo mkdir /var/www/xxx.ca
sudo chown -R $USER:$USER /var/www/xxx.ca
sudo chmod -R 755 /var/www/xxx.ca
sudo nano /etc/apache2/sites-available/xxx.conf
sudo a2endsite xxx.conf
sudo a2dissite 000-default.conf
sudo systemctl reload apache2
sudo systemctl restart apache2
nano /var/www/xxx/index.html

enable ssl
=========
sudo apt install certbot
sudo apt install python3-certbot-apache
sudo certbot --apache


create robots.txt for search engine
===================================
touch /var/www/html/robots.txt
nano robots.txt
User-agent: *
Disallow: 

view logs
=========
cat /var/log/apache2/access.log.1

rotate logs
===========
cat /etc/logrotate.d/apache2

error pages
============
nano /etc/apache2/sites-available/000-default-le-ssl.conf

add before virtual host tag
ErrorDocument 404 "The requested document was not found on this server."
sudo service apache2 restart