upgrade from Ubuntu 20.04 to ISC packages on Launchpad break `host`
Summary
Upgrade from Ubuntu-supplied packages to ISC-supplied packages from Launchpad break host
utility.
BIND version used
Platform: Ubuntu 20.04 Package version: 1:9.18.4-1+ubuntu20.04.1+isc+1
Steps to reproduce
sudo add-apt-repository ppa:isc/bind
sudo apt update
sudo apt install bind9
What is the current bug behavior?
Problem:
$ host -V
host: error while loading shared libraries: libdns.so.1601: cannot open shared object file: No such file or directory
$ dpkg -l | grep bind9
ii bind9 1:9.18.4-1+ubuntu20.04.1+isc+1 amd64 Internet Domain Name Server
ii bind9-dnsutils 1:9.18.4-1+ubuntu20.04.1+isc+1 amd64 Clients provided with BIND 9
ii bind9-host 1:9.16.1-0ubuntu2.10 amd64 DNS Lookup Utility
ii bind9-libs:amd64 1:9.18.4-1+ubuntu20.04.1+isc+1 amd64 Shared Libraries used by BIND 9
ii bind9-utils 1:9.18.4-1+ubuntu20.04.1+isc+1 amd64 Utilities for BIND 9
What is the expected correct behavior?
Reporter expected the -host package to correctly upgrade.
FTR I did not discover this but it was reported to me privately.