Remote access to Graphics Card on Ubuntu 14.04 or later

remote-gfx-UbuntuDesktop.bash

#!/usr/bin/env bash
# Run with sudo

# Allow tcp forwarding through lightDM, username must be login name
username=$USER
if [[ $username == 'root' ]] && [[ -n $SUDO_USER ]]; then
  username=$SUDO_USER
fi

confdir=/etc/lightdm/lightdm.conf.d

tcpconf=${confdir}/allow-tcp.conf
alogconf=${confdir}/autologin-user.conf

userconfdir=${HOME}/.config/autostart

lockscreen_user_conf=${userconfdir}/auto-screen-lock.desktop

! [[ -d $confdir ]] && sudo mkdir -p $confdir || :
! [[ -d $userconfdir ]] && mkdir -p $userconfdir || :

sudo cat <<- __EOF > $tcpconf
[SeatDefaults]
xserver-allow-tcp=true
__EOF

sudo cat <<- __EOF > $alogconf
[SeatDefaults]
autologin-user=$username
__EOF

# Next section auto-locks computer after auto-login, allowing graphics card
# to connect to desktop session and thus allowing remote user access to 
# graphics card without compromising local security.
cat <<- __EOF > $lockscreen_user_conf
# Autolocks PC after automatic login
[Desktop Entry]
Type=Application
Name=Lock Screensaver
Exec=gnome-screensaver-command -l
__EOF

chown $username:$username $lockscreen_user_conf