sudo apt install python3.8 -y
sudo apt install xdg-utils wget xz-utils -y
sudo apt install libnss3 -y
sudo apt-get install xorg openbox -y
sudo apt-get install ubuntu-desktop -y

mkdir ~/tmp
cd ~/tmp
wget https://download.calibre-ebook.com/4.17.0/calibre-4.17.0-x86_64.txz

sudo mkdir -p /opt/calibre
sudo rm -rf /opt/calibre/*
sudo tar xvf ~/tmp/calibre-4.17.0-x86_64.txz -C /opt/calibre
sudo /opt/calibre/calibre_postinstall