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linux-permissions-calculator

v1.0.0

Published

Interactive Linux file permissions calculator in your terminal. Convert between octal and symbolic notation, calculate umask, understand SUID/SGID/sticky bit.

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Links

Git

Maintainers

dargslandargslan

Keywords

linuxpermissionschmodcalculatoroctalsymbolicumasksuidsgidsticky-bitterminalclifile-permissionssecuritysysadmindevops

Readme

🔐 Linux Permissions Calculator

npm License: MIT

Interactive Linux file permissions calculator right in your terminal. Convert between octal and symbolic notation, calculate umask, understand SUID/SGID/sticky bit.

Quick Start

npx linux-permissions-calculator

Direct mode:

npx linux-permissions-calculator 755
npx linux-permissions-calculator rwxr-xr-x

Features

  • 🔄 Octal ↔ Symbolic conversion (755 → rwxr-xr-x and back)
  • 🎯 Interactive builder — answer yes/no for each permission
  • 📊 Umask calculator — see what file/directory permissions umask produces
  • 📖 Common permissions reference — quick lookup for 644, 755, 600, etc.
  • 🔒 Special bits — SUID, SGID, Sticky bit explained with examples
  • ⚡ Direct mode — npx linux-permissions-calculator 755 for instant answers
  • 🚀 Zero dependencies

Modes

| Mode | Description | |------|-------------| | Octal → Symbolic | Enter 755, get rwxr-xr-x with breakdown | | Symbolic → Octal | Enter rwxr-xr-x, get 755 | | Interactive Builder | Answer y/n for read/write/execute per entity | | Umask Calculator | See resulting permissions for any umask value | | Reference Table | Common permissions with use cases | | Special Bits | SUID/SGID/Sticky explained |

More Tools

  • 🐧 npx dargslan-linux-quiz — Linux Quiz
  • 📝 npx dargslan-bash-quiz — Bash Scripting Quiz
  • ⏰ npx cron-generator-cli — Cron Expression Generator
  • 🔑 npx ssh-config-generator — SSH Config Builder
  • 🛡️ npx server-hardening-checklist — Security Audit

Learn More

License

MIT — dargslan.com