It might look all that simple, but it took me a while to figure out. The following command looks for directories and sets the permission to 777. First you need to ch into the directory and change them from there.
If you’re installing SugarCRM you are required to set the entire directories as well as files under modules directory to writable. Go on now.
You can use the following to set the file permissions
find . -type f -exec chmod 666 \{\} \;