To give different permission settings for all subdirectories and subfiles use following commands:
find /start/location/ -type f -print0 | xargs -0 chmod 644
find /start/location/ -type d -print0 | xargs -0 chmod 755
If you receive such an error "permission denied", run above commands as root with "su" parameter or try them as following:
sudo find /start/location/ -type f -print0 | sudo xargs -0 chmod 644
sudo find /start/location/ -type d -print0 | sudo xargs -0 chmod 755
In here permission settings of all subfiles will be changed to "644" and all subdirectories will be changed to "755".
