Saad khanACLs & Masks in Linux
ACLs (Access Control Lists) extend basic Linux permissions — you can grant access to specific users/groups beyond the traditional owner/group/others model.
Masks act as a safety limit. They define the maximum effective permissions for group entries and named users.
Use setfacl -m u:username:rwx file and getfacl file to manage them.
Powerful. Precise. Essential. 🔐
