Unix Permission Rechner
Convert chmod modes between octal, symbolic and rwx notation.
644
Octal
rw-r--r--
Symbolic
420
Decimal
Read is 4, write is 2, execute is 1 — each group sums to a digit. The leading digit in chmod 755 is the special-flag bit (setuid, setgid, sticky).
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Über
Type a mode such as 644 or rwxr-xr-x and every representation is shown at once: the octal number, the symbolic rwx form, the decimal value and ready-to-paste chmod commands.
Read is 4, write is 2 and execute is 1, so each of the owner, group and others columns sums to a single digit. The checkboxes let you build a mode bit by bit and watch the numbers update.
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