Xubuntu Desktop

Setup autologin

nano /etc/lightdm/lightdm.conf

and adjust/add the below values

[SeatDefaults]
greeter-session=lightdm-gtk-greeter
autologin-user=rkhan
autologin-user-timeout=0

reboot instead of shutdown when power button is pressed

nano /etc/systemd/logind.conf

and change the following line as

HandlePowerKey=reboot

reference Install power manager

apt-get install xfce4-power-manager