Upgrading my Ubuntu 14.04 LTS to 16.04 then 18.04 LTS left LTSP unable to boot clients. I am using the traditional 2 NIC structure on 1404, with thin clients on a physically separate subnet, and their system in chroot. It uses isc-dhcp-server and tftpd-hpa.
Trying to debug my upgraded system (including switching to dnsmasq) I came across bugs which only seem to be fixed in versions of packages later than those in the bionic repos, with no backports, so I gave up on the upgrade route.
So is there a currently reliable way of installing LTSP on 1804?