Can you check if you have all repositories enabled? main, restricted, universe, multiverse, and updates and security?
Please show: apt-cache policy krb5-user libkrb5-3 ** Changed in: krb5 (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Server, which is subscribed to krb5 in Ubuntu. https://bugs.launchpad.net/bugs/1823055 Title: krb5-user fails to install on 18.04 AMD64 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/krb5/+bug/1823055/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs