Hi

    Am Sa., 17. Feb. 2024 um 08:10 Uhr schrieb 'haaber' via
    qubes-users <qubes-users@googlegroups.com>:

        Hi
        > I tried to upgrade my Qubes OS system from 4.1.2 to 4.2.0
        using the
        > "qubes-dist-upgrade" script.
        ...
        >
        OK, I am not an expert on THIS question. Some general remarks: the
        network card seems to work, right? So you need to check where
        the chain
        breaks.

        - go to sys-net (open terminal via widget) type ping 8.8.8.8
        and see if
        you come out


    Working.

        - go to sys-firewall (terminal via widget) and do the same.


    Working as well.

        if these two work, and an app-vm has no network, its config
        got lost.
        Look at network settings of the corresponding appVM. It should be
        sys-firewall in std setting, apart anon-whonix, of corse which
        uses
        sys-whonix.


     Not working. - I changed the settings from "default
    (sys-firewall) (current)" to "sys-firewall" in one App-VM ...

    An additional / new info is, that an update check for 'dom0' does
    no longer work !


all updates go via tor network (sys-whonix) by default. You could click
on the blue qube widget -> sys-wonix -> run terminal and see if
sys-whonix has network. But I guess not. Here is why:

https://www.qubes-os.org/doc/firewall/

I wild-guess that you are in a "half-state" where one part of the system
expects iptables, another one nftables ...

Did you download / start to download new (debian/fedora) Templates or
are they the "old" ones?



I did not see any other user jump to your help, and I am not good enough
to fix that alone for you. So honestly, at your place I would

(1) backup data (again)

(2) extract the list of manually installed packages in each of your
templates and stock them on your backup drive

    ("apt-mark showmanual > manual.packages.list" in a terminal is your
friend, no root priv needed)

(3) re-install a clean 4.2

(4) replay your manual installs of packages in your templates:

    "cat  manual.packages.list | apt-get install  " or something of
this type should work (run as root)

(5) restore your data.

It's a pain and takes half a day, but I fear that it is, at the end of
the day,  faster than any other solution...

good luck!

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