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#1 2020-06-10 20:27:22

jole
Member
Registered: 2020-06-10
Posts: 8

[Solved] No internet via cable when I boot from usb to install

Trying to install arch on my Dell Latitude E6230 I run into a problem.

After having booted from the live usb, one of the first things I try, as per the installation guide, is to ping the internet to see that I have a valid connection.

ping -c 3 archlinux.org

This outputs the following

ping: archlinux.org: Name or service not known

This is not the first time I install arch on this particular pc, nor is it the first time I come across this problem. Earlier today I had the same problem, but then it suddenly worked fine, and kept working fine for as long as i ran arch.

Now, I am new to arch and want to set it up again since I want to make some changes during setup. And this time I came across this problem.

My internet connection is fine, I run the computer I write this message on from the same switch and I have tried to cross cables between the two without luck.

When I run

ip a

I get

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether f0:1f:af:10:e3:ea brd ff:ff:ff:ff:ff:ff
    altname enp0s25
    inet 172.16.218.82/23 brd 172.16.219.255 scope global dynamic eno1
       valid_lft 604469sec preferred_lft 604469sec
    inet6 fe80::f21f:afff:fe10:e3ea/64 scope link 
       valid_lft forever preferred_lft forever
3: wwp0s29u1u6i6: <BROADCAST,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 1a:ea:b4:01:6e:89 brd ff:ff:ff:ff:ff:ff
4: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
    link/ether 3c:a9:f4:37:1e:e4 brd ff:ff:ff:ff:ff:ff

From what I understand after doinf some investigating online, I understand that my ethernet adapter is the one marked

2: eno1

and that the

UP

in

BROADCAST,MULTICAST,UP,LOWER_UP

indicates that my adapter is up and running.

But from there I'm quite lost and need help.

Thanks to Trilby for pointing out that I needed to make my post a lot clearer.

Regards
/Jon

Last edited by jole (2020-06-14 17:03:58)

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#2 2020-06-10 20:30:59

Trilby
Inspector Parrot
Registered: 2011-11-29
Posts: 24,222
Website

Re: [Solved] No internet via cable when I boot from usb to install


"UNIX is simple and coherent..." - Dennis Ritchie, "GNU's Not UNIX" -  Richard Stallman

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#3 2020-06-10 21:05:17

jole
Member
Registered: 2020-06-10
Posts: 8

Re: [Solved] No internet via cable when I boot from usb to install

Of course, thank you. My apologies for being a bit hasty there.

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#4 2020-06-10 21:22:24

Trilby
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Registered: 2011-11-29
Posts: 24,222
Website

Re: [Solved] No internet via cable when I boot from usb to install

Thanks for the edits, that's much better.

Now we can see that not only is the interface up, but there is also a connection.  This suggests that the problem may just be name resolution.  Can you ping IP addresses, e.g., `ping 8.8.8.8`?

If so, please post the content of /etc/resolve.conf.

Last edited by Trilby (2020-06-10 21:22:50)


"UNIX is simple and coherent..." - Dennis Ritchie, "GNU's Not UNIX" -  Richard Stallman

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#5 2020-06-10 21:28:12

jole
Member
Registered: 2020-06-10
Posts: 8

Re: [Solved] No internet via cable when I boot from usb to install

Thanks for a quick reply Trilby.

Yes, I'm able to ping 8.8.8.8

The contents of /etc/resolve.conf (the comments aside) are as follows:

 
nameserver 127.0.0.53
options edns0

Last edited by jole (2020-06-10 21:36:22)

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#6 2020-06-10 21:39:24

Trilby
Inspector Parrot
Registered: 2011-11-29
Posts: 24,222
Website

Re: [Solved] No internet via cable when I boot from usb to install

So that's the problem.  I've never used nor understood systemd-resolved which is likely what is in use on the iso now, so I can't help with a direct solution.  But simple workarounds could either be shut down the systemd services and just run dhcpcd, or - alternatively - just append another nameserver to /etc/resolve.conf, e.g.

echo "nameserver 8.8.8.8" >> /etc/resolve.conf

"UNIX is simple and coherent..." - Dennis Ritchie, "GNU's Not UNIX" -  Richard Stallman

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#7 2020-06-10 21:47:19

jole
Member
Registered: 2020-06-10
Posts: 8

Re: [Solved] No internet via cable when I boot from usb to install

Ok, thanks.

I'll try your suggestion. I'll continue tomorrow if it doesn't work.

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#8 2020-06-11 17:44:07

jole
Member
Registered: 2020-06-10
Posts: 8

Re: [Solved] No internet via cable when I boot from usb to install

Started fresh today, trying to figure this one out.

Tinkered for about a few hour or so, and even though I've tried this on several occasions during the last hours it finally woked. I am not quite sure what did the trick, but here's what i did:

systemctl stop systemd-resolved.service
dhcpcd

Thank you Trilby for taking the time, much appreciated.

[Edit]
To satisfy my own curiosity I repeated the task several times. and it worked as described here every time. From my point of view, this issue is solved.

/Jon

Last edited by jole (2020-06-11 19:31:02)

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