I encountered a couple of errors during the initial update process, which appeared to have left APT in a corrupt state or unable to upgrade. Remember to take a VMware SnapShot (if possible) before you start – just in case.
Issue 1: To clear this I used the following commands:
The folder now contained just the ‘lock’ and ‘partial’ files, the updates now worked fine. Just go back to the beginning and start again, or revert to your SnapShot from before you begin!
Issue 2: Also, please check the APT Repository setting either:-
Using the GUI – under Settings, Server, APT repository
Use VI ti edit /etc/apt/sources.list
The last line, needs to agree with the correct version of Zen Load Balancer eg.
For version 1 installs, the last three characters should say: v1/
For version 2 installs, the last three characters should say: v2/