For local testing purposes I installed Apache2, PHP5 and MySQL on a copy of Linux Mint. Using the Software Manager I was able to install everything quickly. Being new at this I needed to find out where localhost or the www folder was exactly. It is located off the root in the var folder.
I wanted to put my own quick “Hello world.php” file in there but did not have permissions. Here is the command line I used to fix that. Open Terminal and type in the following command.
sudo chmod -R 777 /var/www
This means Super User do change there permissions in reclusive order to read, write and execute on the root slash www folder.