Chmod Calculator

Visual Unix file permissions calculator

Quick Reference: Permissions format: Owner-Group-Other
• Octal: 754 = Owner(7), Group(5), Other(4)
• Symbolic: -rwxr-xr-- = File type + Owner(rwx) + Group(r-x) + Other(r--)
Enter 3 or 4 digit octal permission value like 755 or 0755
Enter symbolic notation like -rwxr-xr-x

Permission Checkboxes

Read (r)
Write (w)
Execute (x)
Owner
Group
Other

Common Presets

Special Permissions

Setuid (4)
Run as file owner
Setgid (2)
Run as file group
Sticky (1)
Restrict deletion

Octal Notation

755

Symbolic Notation

-rwxr-xr-x

chmod Command

chmod 755 filename

Octal Reference

0
---
1
--x
2
-w-
3
-wx
4
r--
5
r-x
6
rw-
7
rwx

Umask Calculator

Calculate default file and directory permissions based on umask value.

Enter a umask value in octal notation to calculate default file and directory permissions
Default File Permissions
644
-rw-r--r--
Default Directory Permissions
755
drwxr-xr-x