For various reasons, I chose to leave Ubuntu 10.04 LTS using OpenSSH 5.3p1. The new features in 5.4p1 such as certificate authentication, the new smartcard handling, netcat mode, and tab-completion in sftp are great, but unfortunately it was available just a little bit too late for me to be able to land it for 10.04 LTS. I realise that many Lucid users want to make use of these features for one reason or another, though, so as a compromise here’s a PPA containing OpenSSH 5.5p1 for Lucid.

I intend to keep this up to date for as long as I reasonably can, and I’m happy to accept bug reports on it in the usual place.