archlinux auto login
/lib/systemd/system/getty@tty1.service.d/20-autologin.conf
[Service]
ExecStart=
ExecStart=-/sbin/agetty --autologin root --noclear %I $TERM
/lib/systemd/system/getty@tty1.service.d/20-autologin.conf
[Service]
ExecStart=
ExecStart=-/sbin/agetty --autologin root --noclear %I $TERM