Objective: To safely upgrade from Debian 8 (Jessie) to Debian 9 (Stretch) two servers and to keep good records of what was done to perform the upgrade. Server #1 is used just to verify and hold backups of other servers so it has no public services running. Server #2 hosts a diaspora*, a Hubzilla, a… Continue reading Upgrading Debian GNU/Linux from Jessie to Stretch