Linux chmod Permission Calculator
Visual permission matrix for Owner, Group, Public with octal (755, 644) and symbolic commands.
POSIX / Linux file permission mode
chmod 755 filename.shClick any layman scenario below to immediately calculate the right chmod mode and command.
You can read and edit; everyone else can only read (HTML, CSS, images, static docs).
You can read, edit, and run; everyone else can read and run (Bash scripts, binaries, CLI tools).
Only you can read and edit; blocked completely from group and everyone else (id_rsa, .env files).
Only you can read, write, and execute; completely hidden from other users on the system.
Read-only for you; prevents accidental edits or deletions; completely blocked for everyone else.
You and members of your group can edit; public users can only read.
You and members of your group can edit and run; public users can only read and run.
Full read, write, and execute access for everyone (/tmp folder, development caches).
interactive permission matrix
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