command to install apache2 in ubuntu 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