wired network not working

[gnu-buntu]

Hello, I don't know much about networking anymore, so advice is welcome in solving this problem:

I recently installed Xubuntu 20.04 LTS on my dual-boot system with Windows 10.
It shows no network connection whatsoever, so I can't use apt to install anything, at least not via a network.
The corresponding live CD works works fine with the wired network, and so does Windows.

I ran the suggested script to collect "wireless" info on both the live CD and the installed, no-network system.

• The live CD results are here: (deleted)
• The installed, no-network system results are here: (deleted)
• The diff (live_CD vs. installed) result between the two files is here: (deleted)

I hope it's pretty obvious what's wrong or where to look next.
Please advise!

Thanks,
-Peter

[gnu-buntu]

While still dozing in bed this morning, it occurred to me that it might be possible to set the live CD apt repository to the one that the installed Linux uses. Then boot to the installed Linux and run apt install there. This could be a way to install necessary or desired packages -- until I can bring up the network for the installed system.

[1fallen]

Part of the problem is Xubuntu 20.04 has hit EOL>>
Codename
Focal Fossa
Release Date
April 23, 2020
End of Life
April 29, 2023

So no driver to install for your network.
Won't 22.04 work for you?

[gnu-buntu]

By golly, you're absolutely right. Thank you!
So I'll upgrade to 22.04 LTS and report back -- with "solved", I hope.

[praseodym]

sudo apt install r8168-dkms dkms build-essential

should do the trick

[1fallen]

By golly, you're absolutely right. Thank you!
So I'll upgrade to 22.04 LTS and report back -- with "solved", I hope.

You should be good to Go with 22.04.

Network:
  Device-1: Realtek RTL8111/8168/8211/8411 PCI Express Gigabit Ethernet
    driver: r8169

On your first wireless report, shows:

Kernel driver in use: r8169

[gnu-buntu]

Thank you all!

Yes, the upgrade to 22.04 fixed it.
My bad, but there were reasons mostly having to do with overlooking critical details.