chmod

The chmod command is a command-line utility in Unix-like operating systems used to change the permissions of files and directories.

Permissions determine the level of access users and groups have to a file or directory, and chmod allows you to modify these permissions to restrict or grant read, write, and execute capabilities.

Common use cases for the chmod command include restricting access to sensitive files, granting permissions to specific users or groups, setting execution permissions for scripts, and managing shared access in multi-user environments.

For example, running chmod u+rwx file.txt grants the owner of file.txt read, write, and execute permissions.

The chmod command is essential for controlling file and directory access and ensuring security and proper management of permissions.