File permissions determine how users on the system can interact with the various files available on it. Users in Linux are divided into logical structures called groups. The number after them is the amount of links to the file/directory. The name after it is the group of the owning users. The first group describes the
Table of contents
Controlling users’ access to files & directoriesWhy are permissions even necessary?Understanding file permissionsThe equivalent for directoriesChanging permissionsA little debt — what links areReal-world example of protection provided by file permissionsConclusionSort: