Re: NetworkManager "nmcli device" saying eth0 and wlan0 are "unavailable"

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Am 27.04.26 um 06:06 schrieb Subhrajit Sain ([email protected] via
blfs-support Mailing List):
> Hello Rainer,
> 
> I have renamed the config file to no-dns-update.conf.bak. But my resolv.conf is set to read only anyways. So that will not change anything. I tried and it still gave the network unreachable message from ping.

You said: "The same devices work as usual with wpa_supplicant and dhcpcd
via init scripts."  So your network-setup seems to be basically OK.  But
your NetworkManager-configuration probably is not or is not suitable for
how you have set up your network.

See whether the logs offer any clues, like with

~> less /var/log/sys.log | grep -i 'networkmanager'

And meticulously check whether your network- and NetworkManager-setup
deviates from the books.

I doubt that a read-only  /etc/resolv.conf  makes sense with
NetworkManager, as NM tries to automatically configure your network for
you.  As I understand it, that's the whole point about NM.  But anyway -
here are the permissions for that file on my systems:

~> ls -l /etc/resolv.conf
-rw-r--r-- 1 root root 30 27. Apr 10:02 /etc/resolv.conf

And here's the first line in that file and in that of an old Debian 8
with NM:

~> head -n1 /etc/resolv.conf
# Generated by NetworkManager


HTH and good luck!

Rainer


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