A couple of students have reported a problem trying to install the recommended packages to get started. It appears that their machine (or the default Ubuntu 24.04 LTS in WSL-2 on Windows) was unaware of, or not searching, remote repositories to find the requested Ubuntu packages.
I'm running 24.04 LTS (works well), and the contents of my package configuration file (a plain text file)
/etc/apt/sources.list.d/ubuntu.sources
is:
Types: deb
URIs: http://au.archive.ubuntu.com/ubuntu/
Suites: noble noble-updates noble-backports
Components: main restricted universe multiverse
Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg
Types: deb
URIs: http://security.ubuntu.com/ubuntu
Suites: noble-security
Components: main restricted universe multiverse
Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg
Of note, it searches an Australian repository for packages, and that may make the downloading a little quicker.
[cf
https://ubuntu.com/server/docs/package-management]