เครื่องคิดเลข chmod

(เอกสารเป็นภาษาอังกฤษ)

What it does

Converts Unix file permissions between octal (755, 4755), symbolic (rwxr-xr-x, rwsr-xr-x), and decimal - covering the full mode including the setuid, setgid, and sticky special bits.

How to use it

1. Toggle the r/w/x bits per group (Owner / Group / Other).
2. Optionally enable setuid, setgid, or sticky.
3. Or type an octal value directly - everything updates live.
4. Copy the symbolic result or share a link.

Examples

• 755 ↔ rwxr-xr-x
• 4755 ↔ rwsr-xr-x (setuid)
• 1777 ↔ rwxrwxrwt (sticky)

Good to know

• Private: all calculation is local.
• The fourth (leading) octal digit encodes special bits: 4 setuid, 2 setgid, 1 sticky.
• Related tools: Bitwise Calculator, Number Base Converter.