umask Command - Set Default File Creation Permissions

umask sets the default permissions (file mode creation mask) for newly created files and directories. It determines which permission bits will not be set on files and directories created by the user.

Syntax

umask [options] [mask]

Examples

umask

umask 022

Notes

• Common umask values: 022 (default), 002, 077.
• Changing umask affects only the current shell session unless set in a profile file.
• Does not affect existing files or directories.