Understanding Linux File Permissions
In Linux, the access level that system processes and users have to files is regulated by file permissions, attributes, and ownership. This system ensures that only authorized users and processes can access specific files and folders. Linux File Permissions The basic Linux permissions model works by associating each system file with an owner and a group and assigning permission access rights for three different classes of users: The file owner. The group members. Others (everybody else). File ownership can be changed using the chown and chgrp commands. Three file permissions types apply to each class of users: The read permission. The write permission. The execute permission. This concept allows you to control which users can read the file, write to the file, or execute the file. To view the file permissions, use the ls command: ls -l file_name The output is something like -rw-r--r-- 12 user user 12.0K Jun 1 19:38 file_name |[-][-][-]- [------] [---] | |...