Linux Chmod Permissions Calculator
Developer UtilitiesInteractive visual matrix and two-way calculator for Linux octal (755, 644) and symbolic (-rwxr-xr-x) permissions with shell commands.
Interactive Linux Chmod Permissions Calculator
Dual-way sync between octal digits, symbolic flags, and interactive permission checkboxes.
Visual Permissions Matrix
| Role / Group | Read (r = 4) | Write (w = 2) | Execute (x = 1) | Octal Sum |
|---|---|---|---|---|
u Owner (User) File creator | 7 | |||
g Group Users in group | 5 | |||
o Public / Others Everyone else | 5 |
Common Linux Presets
Command Target & Generator
- Read contents
- Write / modify
- Execute / enter dir
- Read contents
- Write / modify
- Execute / enter dir
- Read contents
- Write / modify
- Execute / enter dir
What is Linux Chmod Permissions Calculator?
Calculate Linux and Unix chmod file permissions interactively with instant two-way synchronization between octal numeric codes, symbolic notation, and visual permission checkboxes. Generate ready-to-run shell commands with recursive options.
How to use Linux Chmod Permissions Calculator
3 simple steps to complete your task directly in your browser:
Toggle Checkboxes or Type Octal Code
Check or uncheck Read (r=4), Write (w=2), and Execute (x=1) permissions for Owner (User), Group, and Public (Others), or simply enter an octal code like 755 or 644.
Inspect Symbolic & Human Explanations
Watch the symbolic notation (`-rwxr-xr-x`) and human-readable access breakdown update live, showing exactly who can read, modify, or execute files and directories.
Generate and Copy Chmod Shell Command
Enter your target file or directory path, optionally enable the recursive `-R` flag, and copy the exact `chmod` command to run in your terminal.
Common uses
- Web Server Deployment: Configure safe 755 directory and 644 file permissions for Nginx, Apache, or WordPress document roots.
- SSH Keys & Security: Lock down private keys (`~/.ssh/id_rsa`) to strict 600 or 400 permissions required by OpenSSH.
- Shell Scripts & Binaries: Grant execute rights (`+x` / 755 / 700) to automated bash scripts, Python CLI utilities, or compiled binaries.
- Shared Team Directories: Set up collaborative group write permissions (664 / 775) with SGID for shared Linux server directories.
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