Thanks Moritz. I’ll do it and update it.
While installing apps through app center, I noticed errors so I’m amending this reply for others on how to resolve it.
-
Apart from the host values, you should also edit the nameserver1 reading as it will point to the old IP address (Univention Join schlägt fehl - #4 by Petersen). This could be done via univention portal by searching DNS. I also edited ethernet card info for future use.
-
Second time I got a new error such as “Unable to negotiate with 192.168.1.2 port 22: no matching key exchange method found. Their offer:…” I was unable to find a solution here it seemed liked it was because of old openssh sever format (https://networkforbeginners.com/no-matching-key-exchange-method-found/). I took a drastic measure (ofcourse, made a backup first) to remove the openssh server and remove the dependency by:
apt-get remove openssh-server
apt-get auto remove
And then reinstalling in by
apt-get install openssh-server
The ssh error went away and I successfully installed the app from the appcenter.