systemd-initctl.service, systemd-initctl.socket, systemd-initctl - /dev/initctl compatibility

       systemd-initctl is a system service that implements compatibility with the /dev/initctl FIFO file system
       object, as implemented by the SysV init system.  systemd-initctl is automatically activated on request
       and terminates itself when it is unused.

       systemd-initctl.service, systemd-initctl.socket, systemd-initctl - /dev/initctl compatibility

systemd(1)

systemd 257.7                                                                         SYSTEMD-INITCTL.SERVICE(8)

       systemd-initctl.service

       systemd-initctl.socket

       /usr/lib/systemd/systemd-initctl