Linux Chmod Permissions Calculator
Local ProcessingCalculate numeric octal (e.g. 755), symbolic notation (rwxr-xr-x), and executable terminal commands for Unix file permissions.
How It Works & Processing Standards
Calculate numeric octal (e.g. 755), symbolic notation (rwxr-xr-x), and executable terminal commands for Unix file permissions.
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Current Limits
- Maximum input length: 100,000 characters
Linux file permissions are three digits (owner, group, others), each the sum of read 4, write 2 and execute 1. Choose checkbox calculation, number → symbols or symbols → number under "Task".
What You Can Do
- Checkbox calculation
- Pick permissions for all three to get the number, symbols and chmod command.
- Number → symbols
- Turns 644 into rw-r--r--.
- Symbols → number
- Turns rwxr-x--- from ls -l into a number.
How to Use Linux Chmod Permissions Calculator
- 1Choose a taskCheckbox calculation, number → symbols or symbols → number.
- 2Enter permissionsPick permissions or type a number or symbols.
- 3Copy the commandCopy the result or the chmod command.
Examples
Common Use Cases
- Making an uploaded script executable
- Writing ls -l output as numeric permissions in docs
- Setting web files to 644 and folders to 755
Frequently Asked Questions (FAQ)
Why not just use 777?
It lets every user write and execute the file, which is risky. 644 for files and 755 for folders or executables is usually enough.