No dressing, simply pure nudity from: https://guacamole.apache.org/doc/1.5.2/gug/installing-guacamole.html
apt-get install git vim neovim htop tmux tidy
apt-get install openjdk-8-jdk-headless tomcat9
JAVA did not come easy, I ended up doing some fingerly labour to get $JAVA_HOME in place. So here is some dressing
ls /usr/lib/jvm/