How to have keyboard backlights turned on at boot

Desktop Environments Plasma
16

1 Create script kb-light.sh:

#!/usr/bin/env bash
echo 3 |  tee /sys/class/leds/asus::kbd_backlight/brightness

Make executable, place in /usr/bin

create /etc/systemd/system/kb-light.service (sudo nano /etc/systemd/system/kb-light.service):

[Unit]
Description=Set Keyboard light

[Service]
User=root
WorkingDirectory=/usr/bin/
ExecStart=kb-light.sh
# optional items below
Restart=always
RestartSec=3

[Install]
WantedBy=multi-user.target

enable sudo systemctl enable kb-light.service --now reboot to test.