CHMOD Calculator – Convert File Permissions Easily (Linux & Unix)
Managing file permissions is a critical skill for Linux and Unix system administrators, developers, and DevOps engineers. A small mistake in permissions can lead to security risks or application failures.
That’s why a CHMOD Calculator is an essential tool to quickly and accurately convert file permission values.
This page helps you calculate, understand, and apply CHMOD permissions without memorizing complex numeric values.
rwxr-xr--
chmod 754 filename
Permission Reference
| Number | Permission | Symbol |
|---|---|---|
| 0 | No permission | --- |
| 1 | Execute | --x |
| 2 | Write | -w- |
| 3 | Write + Execute | -wx |
| 4 | Read | r-- |
| 5 | Read + Execute | r-x |
| 6 | Read + Write | rw- |
| 7 | Read + Write + Execute | rwx |
Common Permissions
755
Standard file/directory
644
Regular file
777
Full access (not recommended)
600
Private file
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