dm-tool:tldr:b4894

The "dm-tool switch-to-greeter" command is a command-line tool used in Linux-based operating systems to switch the currently logged-in user session to the login (or greeter) screen.

In a typical Linux desktop environment, when a user logs in, they are presented with a graphical interface (desktop) and various applications to use. The user's session is managed by a display manager (DM) responsible for handling the login process, session management, and user interactions.

Sometimes, for various reasons, there may be a need to return to the login screen while keeping the session intact. The "dm-tool switch-to-greeter" command facilitates this by triggering a switch from the current user session to the greeter (login) screen. This can be useful in situations such as switching users, troubleshooting, or when there is a need to temporarily lock the user's screen.

When executed, the command communicates with the display manager and requests a switch to the greeter, allowing another user to log in or presenting the login options. The currently logged-in user's session is not terminated, and their applications and workspace are preserved. To resume the session, the user can log back in or select their account from the login screen.

Note that the availability and functionality of the "dm-tool" command can vary depending on the specific Linux distribution and desktop environment used.