Chmod Calculator
Visually generate Linux file permissions (chmod). Toggle Read, Write, and Execute flags for Owner, Group, and Public to get the correct octal or symbolic code.
Select Permissions
Owner
Group
Public
Result and Command
-rwxr-xr-x
Common Permissions
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Understanding Linux Permissions
In Linux and Unix-like operating systems, file permissions determine who can read, write, or execute a file. These permissions are defined for three categories of users:
- Owner (User): The person who owns the file (usually the creator).
- Group: Users who are members of the file's assigned group.
- Public (Others): Everyone else.
Permissions can be represented numerically (Octal) or symbolically.
Octal Notation
Each permission has a numeric value: Read = 4, Write = 2, Execute = 1. These are added together for each user category. For example, Read + Write = 4 + 2 = 6. A full permission set is a 3-digit number (e.g., 755).