не помогло:
# cat /etc/systemd/system/numlockx.service
[Unit]
Description=numlock
[Service]
ExecStart=/usr/local/bin/numlock
StandardInput=tty
RemainAfterExit=yes
[Install]
# systemctl enable numlockx
# reboot
# systemctl status numlockx
numlockx.service - numlock
Loaded: loaded (/etc/systemd/system/numlockx.service; enabled)
Active: active (exited) (Result: exit-code) since Ср 2018-08-22 16:58:20 MSK; 50s ago
Process: 548 ExecStart=/usr/local/bin/numlock (code=exited, status=203/EXEC)
также не помогло добавление строки /usr/bin/numlockx в файлы /etc/rc.d/scripts/first_time и /etc/rc.d/rc