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Old 05-17-2018, 07:11 AM   #1
JZL240I-U
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Registered: Apr 2003
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Distribution: openSuSE Tumbleweed-KDE, Mint 17.3+18.3, MX-17
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Connect with dolphin / sftp to multi-boot box -> known_host key handling


I use a PC and a netbook, the latter connected via WLAN to the router, router and PC via ethernet. Both are multi-boot systems.

I have a working connection of opensuse tumbleweed (PC) to opensuse tumbleweed (netbook) using dolphin's sftp (fish?) service. I want to establish also a connection of opensuse tumbleweed (PC) to MX-17 (netbook) again with dolphin.

When I try to intitialize the connection dolphin on the PC gives an error, something like "the host key of the server changed, DNS-spoofing ... Fingerprint = xyz, contact your administrator" (advice to soliloquize? ).

I suspect from this thread (https://www.linuxquestions.org/quest...0/#post5855589) that this has to do with the keys in known_hosts. How can I place the keys for both systems on the netbook in the known_Hosts file of the PC? Note that the host name (netbook) is the same in tumbleweed and MX17. Thanks for any suggestions .

Last edited by JZL240I-U; 05-17-2018 at 07:13 AM.
 
Old 05-17-2018, 07:42 AM   #2
Turbocapitalist
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1) Well, one way is to add both sets of keys to the known_hosts file. So you will have several keys for the same address or IP number.

2) Another way is to have all the systems that boot on the same device use the same keys.

Code:
sudo tar zcf keys.tar.gz /etc/ssh/*key*
Then copy the tarball to somewhere you can read it later and reboot to the other system. Once rebooted in the other system copy the keys over the existing ones.

Code:
cd /etc/
sudo tar zxpf keys.tar.gz
Then restart sshd.
 
Old 05-18-2018, 12:23 PM   #3
JZL240I-U
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Registered: Apr 2003
Location: Germany
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I used your scheme #1). Worked like a charm. (Had to think hard what key to paste where, since SUSE is very differently organized as compared to MX-17, but no problems).

Thank you, solved.

 
  


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