Getting Internal Server Error while trying to access my site

A 500 Error is often caused due to an issue with Permissions. Check out the following guide on setting proper permissions using Cyberduck (you will want to research permissions for your particular FTP client):

http://webmaster.iu.edu/chmod/chmod_mac.shtml

Additionally, you can check out the error log and get more information on what is causing the error. If you have an administrator gui provided to you by your host, that will be a good place to check. Here is an example video for cPanel (you will want to check with your host for how to access this report on your specific admin. interface):

http://www.youtube.com/watch?v=pzO1UNHZjZo

It appears that your host (bigrock.in) provides cPanel and Linux hosting, so the above video should be helpful. If not, consider contacting your host by submitting a support ticket here:

http://support.bigrock.com/index.php?/Tickets/Submit

I am also getting 500 Internal server error. My Problem

Try checking the server error. In my case I used

cd /var/log

Then I used sudo cat apache2/access.log(I was not able to cd into the apache2 directory directly, so this workaround)

also try sudo cat apache2/error.log if it helps.

If any of the above or other solution is not working for you then have a look at this link

https://forums.cpanel.net/threads/public_html-is-writable-by-group-error.627391/

Here Cpanel community team member suggest that public_html should have the permission set as 750

This solution worked for me :)