chmod Calculator
Interactively build Linux/Unix file permissions. Toggle bits visually, or enter octal/symbolic directly.
ReadWriteExecute
Owner
Group
Others
Octal 644
Symbolic rw-r--r--
Binary 110 100 100
Enter Octal
Enter Symbolic
Common Presets
Permission Reference
Read (r / 4) View file contents or list directory
Write (w / 2) Modify file or create/delete in directory
Execute (x / 1) Run as program or enter/traverse directory
Setuid (s) Run file as owner; show owner's s in execute bit
Setgid (s) Run as group; new dir files inherit group
Sticky (t) Only owner can delete their files (e.g. /tmp)