On Tue 30 Jan 2024 at 10:13:34 (+0900), Byunghee HWANG (황병희) wrote: > On Mon, 2024-01-29 at 09:35 -0600, David Wright wrote: > > On Mon 29 Jan 2024 at 21:36:39 (+0900), Byunghee HWANG (황병희) wrote: > > > > > > For months ago, i did upgrade Debian 12 to Debian Sid. At that > > > time, > > > Gnome network icon was odd. That appered as like question mark. So > > > after i googling, i removed some file in /etc. Then OK! The > > > Internet is > > > started. (i did googling with smartphone). > > > > > > <quote> > > > soyeomul@thinkpad-e495:/etc/network$ LANG=C.UTF-8 ls -l > > > total 24 > > > drwxr-xr-x 2 root root 4096 Jan 7 18:51 if-down.d > > > drwxr-xr-x 2 root root 4096 Jan 8 19:45 if-post-down.d > > > drwxr-xr-x 2 root root 4096 Jan 8 19:45 if-pre-up.d > > > drwxr-xr-x 2 root root 4096 Jan 7 18:51 if-up.d > > > drwxr-xr-x 2 root root 4096 Jan 24 2023 interfaces.d > > > -rw-r--r-- 1 root root 433 Oct 4 17:23 interfaces.orig > > > soyeomul@thinkpad-e495:/etc/network$ > > > </quote> > > > > > > As you see above, i removed /etc/network/interfaces file. Anyway > > > now it > > > works everything! No problem! > > > > > > Is this a bug? Or am i wrong? > > > > > > Ref: > > > https://unix.stackexchange.com/questions/457856/how-to-fix-debians-networkmanager-with-question-mark-even-though-network-is-wor > > > > AIUI there are several network configuration tools that defer to > > configurations that are set up in /e/n/i, which would be handled > > by ifupdown preferentially. Generally, removing /e/n/i completely, > > as you have, is fine. One side effect is that any entries in > > /e/n/interfaces.d/ will also be disabled. > > > > The only machine on which I keep /e/n/i and ifupdown is my travelling > > laptop, for tethering with my phone: > > > > allow-hotplug usb0 > > > > iface usb0 inet dhcp > > > > BTW I don't know why you're running sid, but it's generally expected > > that sid users would be familiar with stuff like this, particularly > > as your question is already answered in the reference. > > In frankly, i don't know interface things and network tools. Whenever I > use the default value, just as it is. So still i don't understand your > reply message in technically.
You have Gnome installed, which implies you configure the network with something like NetworkManager. You /had/ a file called /etc/network/interfaces, which implied you were configuring the network with ifupdown. If you try to configure the same /interface/ (which could be called something like eth0) with both NetworkManager and ifupdown, then NetworkManager should back off and let ifupdown do the configuring. I can't tell you whether that makes Gnome display a question mark, but others might know. (I don't use Gnome, NetworkManager, or ifupdown.) When you renamed the file to /etc/network/interfaces.orig, then ifupdown can no longer read it, nor take priority over NetworkManager, and NetworkManager should be happy to configure the interface itself. The question mark should go away. (Do you get a happy face displayed instead, or is NetworkManager more boring than that?) I would tend to think that: . The debian-installer installs ifupdown by default when you don't install a Desktop Manager like Gnome, . The debian-installer installs NetworkManager by default if you do install a Desktop Manager like Gnome, . It shouldn't do both. But, if you upgrade an ifupdown-system and add NetworkManager in whatever way, then it's up to you to remove/hide any ifupdown configuration that you want NetworkManager to perform. That's probably what you did by renaming the file. Cheers, David.
