How to kill apache2 service running on port 80 and how to stop apache2 from launching at start up - Linux and Mac

start.stop.apache2.instructions.md

How to stop apache2 from autostarting during start up

How to stop apache2 from autostarting during start up - Linux

• start - sudo service apache2 start
• stop - sudo service apache2 stop
• restart - sudo service apache2 restart
• enable auto launch - sudo systemctl enable apache2
• disable apache2 auto launch - sudo systemctl disable apache2

(works on ubuntu 16.04 or later which use systemd)

How to kill apache2 service running on port 80 - Linux

• any process running on ports lower than 1024 needs sudo access

• if you simply do lsof -i:80, you won't get the apache2 server's pid

• you will have to use sudo

  sudo lsof -i:80
  [sudo] password for $USERNAME: 
  
  COMMAND     PID     USER   FD   TYPE  DEVICE SIZE/OFF NODE NAME
  apache2    1251     root    4u  IPv6   33732      0t0  TCP *:http (LISTEN)
  apache2   23440 www-data    4u  IPv6   33732      0t0  TCP *:http (LISTEN)
  apache2   23441 www-data    4u  IPv6   33732      0t0  TCP *:http (LISTEN)
  plugin_ho 23443     root   17u  IPv4 1491055      0t0  TCP $USERNAME-laptop:52790->45.55.41.223:http (CLOSE_WAIT)
  

• the process carrying the USER as root is the main one

• other processes carrying the USER as www-data are the child processes spawned from the root process