Chmod Calculator
Permissions
| Read | Write | Execute | |
|---|---|---|---|
| owner | |||
| group | |||
| others |
Result
000
---------
Command:
chmod 000 file.txt
Common Presets
About the Chmod Calculator
Linux file permissions use a numeric notation (like 755 or 644) that maps to read, write, and execute for owner, group, and others. Converting between the numeric and symbolic forms is a constant need for sysadmins.
Toggle the permission checkboxes for owner, group, and others — the calculator shows both the numeric code (755) and symbolic form (rwxr-xr-x). Includes common presets like 755 for scripts and 644 for config files.
How to use
- Toggle read, write, and execute for owner, group, and others.
- The numeric code and symbolic notation update in real-time.
- Or enter a numeric code to see the symbolic equivalent.
- Copy the chmod command ready to paste in your terminal.
Frequently Asked Questions
What does chmod 755 mean? ▾
Owner has read/write/execute (7), group has read/execute (5), others have read/execute (5). This is standard for executable scripts and directories.
What does chmod 644 mean? ▾
Owner has read/write (6), group has read-only (4), others have read-only (4). This is standard for configuration files and documents.