Changing Permission For all Files within Directories

You are getting argument list error as there are large number of files.

Or you are getting an 500 error. If you are getting a 500 error then your files need to change to 644.

With this solution you will be up and running in just a few minutes.

You can use the following command to change only the file permission to 666 inside a directory or to 644.

This command will not change permission of the folders present inside this directory

cd /path/to/directory
find . -type f | xargs chmod 666

You can modify back to 644 or from 666 as below.

cd /path/to/directory
find . -type f | xargs chmod 644