Linux Permission Console
Chmod Calculator
Use this Linux file permissions calculator and chmod calculator to convert rwx choices into octal values, symbolic notation, and copy-ready terminal commands before changing existing files or directories.
Octal
755
Symbolic
rwxr-xr-x
Permission Matrix
Owner, Group, and Public each combine Read, Write, and Execute.
Owner
User account that owns the file.
7
Group
Users that belong to the file group.
5
Public
Everyone else on the system.
5
Special bits
Optional leading chmod digit for setuid, setgid, and sticky bit modes.
0
Detailed guide
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Read the Chmod Calculator guideFrequently asked questions
What is a Linux file permissions calculator?
A chmod calculator converts Linux file permission choices for owner, group, and public into octal permission codes such as 755, symbolic rwx notation, and chmod terminal commands.
What does chmod 755 mean?
chmod 755 means the owner can read, write, and execute, while the group and public can read and execute but cannot write. Its symbolic form is rwxr-xr-x.
Is chmod 777 safe?
chmod 777 is usually unsafe because it grants read, write, and execute permissions to everyone. It can create severe security risks on shared or public systems.