runlevelit
Runlevel is a feature in Unix-like operating systems that controls the system's behavior when it boots or enters a new runlevel. A runlevel is a number or character that determines the services and processes that are started or stopped. It is commonly used in init systems such as System V and systemd.
The default runlevel is set when the system boots and can be changed later in the boot
There are various runlevels designated for specific purposes. For example, a multi-user runlevel, such as 3
System administrators can switch between runlevels using the telinit command or the systemctl command on systemd-based
While runlevels have been used in a similar manner, the term "runlevelit" is not a standard syntax