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After typing a few commands my new install of Ubuntu 16.04 hangs. Sometimes it will come back to life after a few seconds (30 or so) other times it just crashes.

I have over 14 servers running previous version of Ubuntu LTS but the new load with 16.04 crashes continuously. I am using Konsole as a client from another machine on the local network.

I can login to any of the previous release with no problem.

Any thoughts or known bug fixes ?

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  • can you post the crash messages please
    – Amias
    Oct 24, 2016 at 12:45
  • There is no crash. But I am now convinced there is a conflict issue with ssh on 16.04. The client was 16.04 desktop sshing to 16.04 LTS. I reloaded the server with 14.05 LTS and there is no problem. I have run memtest with no errors. <br/> CONFIG SETTINGS: Host tgideon HostName 192.168.0.185 Port 1200 User jmd TCPKeepAlive yes ServerAliveInterval 5 ServerAliveCountMax 30
    – James Doherty
    Oct 24, 2016 at 15:24
  • debug3: receive packet: type 82 debug3: send packet: type 80 debug3: receive packet: type 82 debug3: send packet: type 80 debug3: receive packet: type 82 debug3: send packet: type 80 debug3: receive packet: type 82 debug3: send packet: type 80 debug3: receive packet: type 82 debug3: send packet: type 80 debug3: receive packet: type 82
    – James Doherty
    Oct 24, 2016 at 21:13
  • thats just normal use.
    – Amias
    Oct 25, 2016 at 10:11

1 Answer 1

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It could be an intermittent hardware issue on your new server. Faulty cable? NIC? Was this machine previously OK running 14.04 ?

Since you are able to connect fine to other machines, if the problem is not hardware, perhaps you should have a look at the configuration of the ssh daemon on the the new 16.04 box, vim /etc/ssh/sshd_config

What have you tried already to troubleshoot this ?
You can run sshd with debugging options on the 16.04 box: " ...debug mode provides a lot of information about the connection and a smaller amount about the server configuration. The server's debugging level (-d) can be raised once, twice (-dd) or thrice (-ddd). "

On your terminal, you can run the ssh client with -vvv option as well.

ssh -p 22 -vvv <user>@<server>
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  • I can connect fine to the 16.04 machine, it is after the connection is established for a few minutes and a few commands that ssh hangs.
    – James Doherty
    Oct 24, 2016 at 13:50

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