If for any reason you want to restore your apache2 directory located at /etc/apache2 to its default state on Ubuntu 15.04 then I have a sure way to do so which I’m gonna share with you. Just follow the steps given below:
Note: I’m not providing any kind of guarantee if you mistakenly delete your data or made any other harm for yourself.
1. Remove the ‘apache2’ Directory
First of all you need to remove ‘apache2’ directory completely and permanently from your system, run the following command to remove the apache2 directory:
sudo rm -R /etc/apache2
2. Restore the ‘apache2’ Directory
Now, after removing we need to restore the ‘apache2′ directory, run the following command in your terminal to restore:
sudo apt-get -o DPkg::Options::="--force-confmiss" --reinstall install apache2
Hopefully the above described method will restore the apache2 directory to its default state. If you are having some problems in this regard then you can ask the relevant question via comments.