sudo apt-get remove apache2
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
  apache2
Use 'apt-get autoremove' to remove them.
The following packages will be REMOVED:
  apache2
0 upgraded, 0 newly installed, 1 to remove and 5 not upgraded.
Need to get 0B of archives.
After unpacking 81.9kB disk space will be freed.
Do you want to continue [Y/n]? Y
(Reading database ... 63689 files and directories currently installed.)
Removing apache2 ...