How to upgrade a server without connection to the Internet
In case you have a server installed which does not have a connection to the Internet you have to perform the upgrades offline.
Prepare the upgrades by downloading all needed step-by-step update images from our update site.
So for an upgrade from UCS 4.3-2 to UCS 4.4 you have to download the following images (only shown 64bit versions):
Copy the downloaded files (*.iso) to your offline server which has to be upgraded. Use whatever is possible for you (internal network, USB-stick) to transfer the files.
Perform the upgrade step by step on the console of the UCS server. When working remotely (ie through PuTTy) make sure you start with a screen session as network might be going down during the upgrades. You can reattach to a screen session by “
screen -x update” then:
screen -S update
Start the upgrade itself:
univention-updater --ignoreterm --ignoressh --iso= *ISOIMAGEFILE*
Repeat step 4 for every upgrade DVD you have downloaded.