Mass change of file permissions in Linux, BSD and MAC

Performing a bulk change of permissions, owner, and group for files and directories in Linux is not a problem. If you only need to apply this to files within a specific directory and its subdirectories, a single command won't be enough.

Here's a concise and functional guide:

Solution for directories and subdirectories:

find ./directory -type d -print0 | xargs -0 chmod 755

Solution for files:

find ./directory -type f -print0 | xargs -0 chmod 644

This also works for changing the group or owner. You just need to replace "chmod" with "chgrp" for changing the group and "chown" for changing the owner.