1.Ubuntu 20.10 sources.list
deb http://old-releases.ubuntu.com/ubuntu/ groovy main restricted
deb http://old-releases.ubuntu.com/ubuntu/ groovy multiverse universe
deb http://old-releases.ubuntu.com/ubuntu/ groovy-updates main restricted
deb http://old-releases.ubuntu.com/ubuntu/ groovy-updates multiverse universe
deb http://old-releases.ubuntu.com/ubuntu/ groovy-backports main restricted
deb http://old-releases.ubuntu.com/ubuntu/ groovy-backports multiverse universe
deb http://old-releases.ubuntu.com/ubuntu/ groovy-security main restricted
deb http://old-releases.ubuntu.com/ubuntu/ groovy-security multiverse universe
