The Ultimate Guide to Linux File Permissions: From `chmod 644` to the Mysterious `@` Symbol

Confused by Linux file permissions? This guide dives deep into the `chmod` command, starting with the common `644` permission setting. Learn how to accurately and safely grant permissions to files and directories. We'll explore the differences between symbolic and octal modes and uncover the true meaning of the mysterious `@` symbol at the end of file permissions—Extended Attributes (xattr)—helping you master Linux permission management with tips from DP@lib00.