Create release and development VMs (#439)

* vm: trim trailing whitespace

Signed-off-by: Radostin Stoyanov <radostin.stoyanov@eng.ox.ac.uk>

* Create dev and release VMs

Signed-off-by: Radostin Stoyanov <radostin.stoyanov@eng.ox.ac.uk>

vm-ubuntu-20.04/root-common-bootstrap.sh

@@ -0,0 +1,40 @@
+#!/bin/bash
+
+# Print commands and exit on errors
+set -xe
+
+useradd -m -d /home/p4 -s /bin/bash p4
+echo "p4:p4" | chpasswd
+echo "p4 ALL=(ALL) NOPASSWD:ALL" > /etc/sudoers.d/99_p4
+chmod 440 /etc/sudoers.d/99_p4
+usermod -aG vboxsf p4
+
+# Install p4 logo as wallpaper
+mv /home/vagrant/p4-logo.png /usr/share/lubuntu/wallpapers/lubuntu-default-wallpaper.png
+
+# 2021-Mar-06 this command failed with an error that the file did not exist.
+#sed -i s@#background=@background=/usr/share/lubuntu/wallpapers/1604-lubuntu-default-wallpaper.png@ /etc/lightdm/lightdm-gtk-greeter.conf
+# The following command will hopefully cause the P4 logo to be normal
+# size and centered on the initial desktop image, rather than scaled
+# and stretched and cropped horribly.
+#sed -i s@wallpaper_mode=crop@wallpaper_mode=center@ /etc/xdg/pcmanfm/lubuntu/desktop-items-0.conf
+
+# If that does not have the desired effect, another possibility is
+# executing that command to edit the same string in file
+# /etc/xdg/pcmanfm/lubuntu/pcmanfm.conf
+
+# TBD: Ubuntu 20.04 does not have the light-locker package, so it
+# fails if you try to remove it.  Probably enabling auto-login
+# requires a different modification than is done below with the cat <<
+# EOF command.
+
+# Disable screensaver
+#apt-get -y remove light-locker
+
+# Automatically log into the P4 user
+#cat << EOF | tee -a /etc/lightdm/lightdm.conf.d/10-lightdm.conf
+#[SeatDefaults]
+#autologin-user=p4
+#autologin-user-timeout=0
+#user-session=Lubuntu
+#EOF