Chmod Calculator

Tips

• • 644 is the standard permission for regular files (owner can edit, others can read)
• • 755 is standard for directories and executable scripts
• • Avoid 777 in production as it gives full access to everyone
• • Each digit represents: 4=read, 2=write, 1=execute (sum them up)
• • Use 600 for sensitive files like SSH keys or config files