Chmod Calculator
Calculate symbolic and octal file permissions for Linux/Unix systems.
Octal
Symbolic
chmod
filename.txt
Owner
Group
Public
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Frequently Asked Questions
What is chmod 777?
It gives full read, write, and execute permissions to everyone (Owner, Group, and Public). This is generally considered insecure.
What is chmod 755?
It is a common permission set where the Owner has full access (read/write/execute), while Group and Public can only read and execute.
What do the numbers mean?
Read = 4, Write = 2, Execute = 1. You sum these up for each category. For example, Read+Write = 4+2 = 6.