Dec. 22, 2015, 10:36 a.m. by mati

Update: Since the Debian now supplies packages via backports, we no longer update these packages. In order to ease transition to Let's Encrypt, we have built up-to-date packages of their client and Apache authenticator for Debian 7.0 (Wheezy) and later as well as Ubuntu 14.04 and later. To install, simply do (replace "jessie" with your distribution codename):
apt-get install apt-transport-https echo "deb jessie letsencrypt" \     >> /etc/apt/sources.list.d/ wget -qO- | apt-key add - apt-get update apt-get install fsinf-keyring letsencrypt python-letsencrypt-apache
This is of course meant as an alternative to installing from source, since Let's Encrypt packages are in no stable distribution yet. Packages are versioned so that any new version coming from the main repositories will be newer then our packages.