Replacing sources.list with the following fixed it deb http://us.archive.ubuntu.com/ubuntu/ bionic main universe restricted multiverse deb-src http://us.archive.ubuntu.com/ubuntu/ bionic main universe restricted multiverse
deb http://security.ubuntu.com/ubuntu bionic-security main universe restricted multiverse deb-src http://security.ubuntu.com/ubuntu bionic-security main universe restricted multiverse
deb http://us.archive.ubuntu.com/ubuntu/ bionic-updates main universe restricted multiverse deb-src http://us.archive.ubuntu.com/ubuntu/ bionic-updates main universe restricted multiverse
deb http://us.archive.ubuntu.com/ubuntu bionic-backports main restricted universe multiverse deb-src http://us.archive.ubuntu.com/ubuntu bionic-backports main restricted universe multiverse
Replacing sources.list with the following fixed it us.archive. ubuntu. com/ubuntu/ bionic main universe restricted multiverse us.archive. ubuntu. com/ubuntu/ bionic main universe restricted multiverse
deb http://
deb-src http://
deb http:// security. ubuntu. com/ubuntu bionic-security main universe restricted multiverse security. ubuntu. com/ubuntu bionic-security main universe restricted multiverse
deb-src http://
deb http:// us.archive. ubuntu. com/ubuntu/ bionic-updates main universe restricted multiverse us.archive. ubuntu. com/ubuntu/ bionic-updates main universe restricted multiverse
deb-src http://
deb http:// us.archive. ubuntu. com/ubuntu bionic-backports main restricted universe multiverse us.archive. ubuntu. com/ubuntu bionic-backports main restricted universe multiverse
deb-src http://