CHMOD Calculator
Calculate and convert Unix file permissions between octal, symbolic, and human-readable formats
Input Method
Enter a 3-digit number using digits 0-7
Enter 9 characters using r, w, x, or - (e.g., rwxr-xr-x)
Permission Results
Octal Notation
000
Symbolic Notation
---------
Command
chmod 000 filename
Human Readable
No permissions for anyone
Common Permission Presets
About CHMOD Permissions
CHMOD (Change Mode) is a Unix command used to change file and directory permissions. Understanding these permissions is crucial for system security and proper file access control.
Permission Types
- Read (r) - View file contents or list directory
- Write (w) - Modify file or directory contents
- Execute (x) - Run file or access directory
User Groups
- Owner - The user who owns the file
- Group - Users in the file's group
- Others - All other users on the system
Octal Values
- 4 - Read permission
- 2 - Write permission
- 1 - Execute permission
- 0 - No permission