how to install apache2 in a ubuntu server code example
Example 1: start apache2 ubuntu
# Restart Apache 2 server on Linux/Unix
sudo service apache2 restart
# Start Apache 2 server on Linux/Unix
sudo service apache2 start
# Stop Apache 2 server on Linux/Unix
sudo service apache2 stop
# Reload Apache 2 server on Linux/Unix "No downtime!"
sudo service apache2 reload
Example 2: reinstal apache2 ubuntu
sudo apt-get --purge remove apache2
sudo apt-get autoremove
sudo apt-get install apache2
sudo /etc/init.d/apache2 restart