Master Linux Permissions and File Types While Your Coffee Brews (2nd revision)
Second revision released in October 2025 and is completely free to download!!!
In Linux, everything you interact with is treated as a file. This is the core idea that makes Linux incredibly flexible and powerful.
In this book, I've explored the various types of files, ranging from regular files to specialized ones used for hardware and communication. I've also explained links, like shortcuts to files, and how to identify them.
Security is a big deal in Linux. File permissions control who can access and modify your files. I've shown you how to use commands like ls and chmod to view and change these permissions, giving you control over your data.
Special permissions, like the Sticky bit, SUID, and SGID, add extra layers of security.
Understanding file types and permissions is essential for any Linux user.
Included Infographics
I made sure the topic in every chapter is easily understandable by creating infographics, as shown below.
I hope you like the book.
Cheers,
Nedim
This book explains the core concepts of Linux. It covers file types, and how to control file access with permissions, including special permissions for enhanced security. A free version offers basic information, while a paid version provides a better learning experience with extra content and exercises.