$ container run --rm -it ubuntu
root@c3a1b62d-8bd8-4572-bdbe-0448ff98587a:/# apt update
Ign:1 http://ports.ubuntu.com/ubuntu-ports noble InRelease
Ign:2 http://ports.ubuntu.com/ubuntu-ports noble-updates InRelease
Ign:3 http://ports.ubuntu.com/ubuntu-ports noble-backports InRelease
Ign:4 http://ports.ubuntu.com/ubuntu-ports noble-security InRelease
Ign:1 http://ports.ubuntu.com/ubuntu-ports noble InRelease
Ign:2 http://ports.ubuntu.com/ubuntu-ports noble-updates InRelease
Ign:3 http://ports.ubuntu.com/ubuntu-ports noble-backports InRelease
Ign:4 http://ports.ubuntu.com/ubuntu-ports noble-security InRelease
Ign:1 http://ports.ubuntu.com/ubuntu-ports noble InRelease
Ign:2 http://ports.ubuntu.com/ubuntu-ports noble-updates InRelease
Ign:3 http://ports.ubuntu.com/ubuntu-ports noble-backports InRelease
Ign:4 http://ports.ubuntu.com/ubuntu-ports noble-security InRelease
Err:1 http://ports.ubuntu.com/ubuntu-ports noble InRelease
  Temporary failure resolving 'ports.ubuntu.com'
Err:2 http://ports.ubuntu.com/ubuntu-ports noble-updates InRelease
  Temporary failure resolving 'ports.ubuntu.com'
Err:3 http://ports.ubuntu.com/ubuntu-ports noble-backports InRelease
  Temporary failure resolving 'ports.ubuntu.com'
Err:4 http://ports.ubuntu.com/ubuntu-ports noble-security InRelease
  Temporary failure resolving 'ports.ubuntu.com'
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
All packages are up to date.
W: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/dists/noble/InRelease  Temporary failure resolving 'ports.ubuntu.com'
W: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/dists/noble-updates/InRelease  Temporary failure resolving 'ports.ubuntu.com'
W: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/dists/noble-backports/InRelease  Temporary failure resolving 'ports.ubuntu.com'
W: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/dists/noble-security/InRelease  Temporary failure resolving 'ports.ubuntu.com'
W: Some index files failed to download. They have been ignored, or old ones used instead