Ubuntu 20.04 LTS desktop ISO：
http://releases.ubuntu.com/focal/ubuntu-20.04-desktop-amd64.iso
Ubuntu 20.04 LTS Live Server ISO：
http://releases.ubuntu.com/focal/ubuntu-20.04-live-server-amd64.iso
Kubuntu 20.04 LTS ISO：
http://cdimage.ubuntu.com/kubuntu/releases/20.04/release/kubuntu-20.04-desktop-amd64.iso
Lubuntu 20.04 LTS ISO：
http://cdimage.ubuntu.com/lubuntu/releases/20.04/release/lubuntu-20.04-desktop-amd64.iso
Ubuntu Budgie 20.04 LTS ISO：
http://cdimage.ubuntu.com/ubuntu-budgie/releases/20.04/release/ubuntu-budgie-20.04-desktop-amd64.iso
Ubuntu Kylin 20.04 LTS ISO：
http://cdimage.ubuntu.com/ubuntukylin/releases/20.04/release/ubuntukylin-20.04-desktop-amd64.iso
Ubuntu MATE 20.04 LTS ISO：
http://cdimage.ubuntu.com/ubuntu-mate/releases/20.04/release/ubuntu-mate-20.04-desktop-amd64.iso
Ubuntu Studio 20.04 LTS ISO：
http://cdimage.ubuntu.com/ubuntustudio/releases/20.04/release/ubuntustudio-20.04-dvd-amd64.iso
Xubuntu 20.04 LTS ISO：
http://cdimage.ubuntu.com/xubuntu/releases/20.04/release/xubuntu-20.04-desktop-amd64.iso
