File PermissionsLesson 40Free preview

Bash Ownership

This lesson is part of Bash · All levels

Summary

Each file and folder in Linux has read (r), write (w), and execute (x) permissions for three parties: owner, group, and others. The ls -l command shows a string of permissions like -rwxr-xr-x whose three blocks represent the user, group, and other. Understanding this permission is the basis of using chmod, chown, and chgrp.

Key points

Permission to read in sequence: user, group, other
R is 4, w is 2, x is 1, so rwx is 7.
The first character indicates the type of entry, d for the directory
The number 755 means rwx for the user and rx for the other.

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