Getting “HTTP Error 500 (Internal Server Error)” while installing Codeigniter

Question

I have no idea why this installation is giving me this problem but for some reason my lamp installation will not show the Codeigniter welcome page. At first I was getting:

403 forbidden

So I changed the permissions of the /var/www/ folder but now I get:

HTTP Error 500 (Internal Server Error): An unexpected condition was encountered while
the server was attempting to fulfil the request.

I had everything working fine before I upgraded to 12.04 but since then, everything has fallen apart. I want the /var/www/ folder set up in a way that I can install several folders with different frameworks and content management systems for my different projects.

I just need a little help getting this server issue worked out.

Answer 1

Try to change your permission to 755

$ sudo chmod -R 755 /var/www/CodeIgniterInstallFolder/

If nothing happens, try to look on your server log.

$ sudo gedit /var/log/apache2/error.log

Answer 2

Your server is probably not able to access the files required.
Just change the permissions on your application.
use these commands
sudo chmod 777 -R /var/www/project
sudo chmod 777 -R /var/www/project/application
OR
simply go to the path /var/www/project
right click > properties > permissions
and set the permissions on folders as well as files.
I hope it will help.