telinit:tldr:cf503

The command "telinit --no-wall ${value}" is used to change the runlevel (operating state) of the system.

Here's what each part of the command means:

• "telinit" is a command in Unix-like systems that allows changing the system's runlevel.
• "--no-wall" is an option used with "telinit" to prevent displaying a message on all logged-in user terminals when changing runlevel.
• "${value}" is a placeholder for a specific runlevel value that needs to be provided.

In this command, you need to replace "${value}" with a valid runlevel value (e.g., 0, 1, 2, 3, 4, 5, or 6) to specify the desired operating state.

For example, if you want to shut down the system, you can use "telinit --no-wall 0". If you want to switch to a different runlevel like multi-user mode, you can use "telinit --no-wall 3" (specific runlevels may have different meanings depending on the system configuration).

By using this command, you can change the system's runlevel, which determines which services and processes are running and available.