I started sysrescuecd v3.7.0 via USB on my PC because I'd like to backup my disk.
My idea was to use dd and nc to send data to a different PC, so I'm using ip addr add to configure the ethernet device like this:

ip addr add dev enp0s25

and I can successfully ping the remote PC.

Problem is that, after a little while (some minutes), it seems that the OS is forgetting the configuration. Pinging doesn't work anymore and ip addr show displays an unconfigured network card. Of course, I'm not rebooting or issuing other ip commands in the meanwhile.

Anybody could help me figure out this, please?

  • What do the system logs have to say about this?
    – Joseph R.
    Jul 2, 2013 at 11:00
  • Don't you happen to have some sort of dhcp client running, that would mess with your network settings after it timeouts?
    – peterph
    Jul 2, 2013 at 11:09

1 Answer 1


I answer my own question: the culprit was the NetworkManager daemon who was messing with the interface configuration in the background, as @peterph correctly suggested.

To solve the situation I started the sysrescue's Xfce desktop environment and configured the network adapter via Settings | Network Connection GUI utility instead of if addr command.

Thank you for the feedback!

  • Can you please add more details? Did you prevent NetworkManager from managing your interface to circumvent this? I ask because I once faced a similar issue and thought it was NetworkManager but it seems the problem was with my wireless card driver.
    – Joseph R.
    Jul 2, 2013 at 12:21
  • 1
    @JosephR. hope it helps!
    – Simone
    Jul 2, 2013 at 20:39
  • It's not the solution I expected but thanks :)
    – Joseph R.
    Jul 2, 2013 at 21:24

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