Modifying many permissions of many users at once

1. How do I change permissions on multiple files at once?
2. Can you assign multiple NTFS permissions?
3. What does chmod 644 mean?

How do I change permissions on multiple files at once?

To modify the permission flags on existing files and directories, use the chmod command ("change mode"). It can be used for individual files or it can be run recursively with the -R option to change permissions for all of the subdirectories and files within a directory.

Can you assign multiple NTFS permissions?

You can apply different NTFS permissions to each file and subfolder that a shared folder contains. In addition to shared folder permissions, users must have NTFS permissions for the files and subfolders that shared folders contain to gain access to those files and subfolders.

What does chmod 644 mean?

Permissions of 644 mean that the owner of the file has read and write access, while the group members and other users on the system only have read access.