Chmod Calculator
Calculate Unix/Linux file permissions with an interactive GUI. Generates octal and symbolic values.
File Permissions
Read
Write
Execute
Owner (u)
Group (g)
Public (o)
Octal Notation
0755
Symbolic Notation
-rwxr-xr-x
About the Chmod Calculator
The chmod command in Unix-like operating systems is used to change the access mode of a file or directory. Permissions are divided into three groups: the Owner of the file, the Group the file belongs to, and Public (everyone else). This calculator helps you safely generate the correct octal notation (e.g., 755) and symbolic notation (e.g., -rwxr-xr-x) for your scripts and commands.
How to Use This Tool
- Review the Classes: The columns are divided into Owner, Group, and Public classes.
- Select Permissions: Check the boxes for Read (r), Write (w), and Execute (x) under each class that you wish to grant.
- View Octal Notation: The resulting numeric representation (useful for the
chmod 777 file.txtsyntax) will automatically update. - View Symbolic Notation: The standard symbolic string (often seen when running
ls -l) will also be generated.