Understand Sudo in Linux
Get in detail knowledge of sudo and sudoers files. Learn how to work with sudo from an infosec point of view
privileges
Demystifying SUID and SGID bits
Learn about SUID, SGID and Sticky bits in detail practically with programs and how to drop privileges gracefully
Understanding Linux File Permissions
Get in-depth knowledge of Linux file permission from administration and infosec point of you.