ubuntu-security-status

Display information about security support for installed Ubuntu packages. More information: https://git.launchpad.net/ubuntu/+source/update-manager/tree/ubuntu-security-status.

• Display the number of unsupported packages:

ubuntu-security-status

• List packages that are no longer available for download:

ubuntu-security-status --unavailable

• List third-party packages:

ubuntu-security-status --thirdparty