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Chmod Calculator
Calculate Unix file permissions. Click permission bits to toggle them, or enter octal directly.
Owner (u)
Group (g)
Others (o)
Read
Write
Exec
Read
Write
Exec
Read
Write
Exec
r
w
x
r
w
x
r
w
x
Octal
Symbolic
Binary
$
chmod
400
filename
Common presets
644 — files
755 — directories
600 — private
777 — all access
700 — owner only
664 — group write
400 — read only
444 — world read