Permissions
| Scope | Read | Write | Execute |
|---|---|---|---|
| Owner | |||
| Group | |||
| Others |
Umask removes permissions from the default mode. It is useful when checking what new files or directories will get from a shell, service, or deployment script.
Convert Unix permissions between chmod numbers, rwx strings, symbolic assignments, and umask results. Use it before running commands in deployment scripts, Dockerfiles, CI jobs, shared directories, and production servers.
The calculator keeps special bits visible because setuid, setgid, and sticky directories can be security-sensitive. Parse an existing mode from ls -l, adjust it with checkboxes, then copy a ready chmod command.