chmod Archives - DevToolHub

Linux File Permissions Explained: chmod, chown, and umask

September 28, 2026October 8, 2026 Amaresh Pelleti

linux file permissions diagram showing chmod numeric mode digits for owner, group, and other

Linux file permissions come down to three numbers and a handful of special bits, but the numbers trip people up because the math isn’t explained where you’d actually see it — on the command line. chmod 755, chmod 2775, umask… Read moreLinux File Permissions Explained: chmod, chown, and umask

Access Control List (ACL): A Guide for File Permissions

July 1, 2024September 28, 2026 Amaresh Pelleti

Understanding file permissions is crucial for system administration and security. The Access Control List (ACL) provides a more fine-grained permission model compared to traditional Unix file permissions. Let’s dive into how you can use ACLs to set specific user permissions…. Read moreAccess Control List (ACL): A Guide for File Permissions