SSH Client On Ubuntu Desktop Timing Out

It would happen again and again and again…. I’d walk away from the computer (yeah, on rare occasions that happens), or I’d flip to another terminal and get sidetracked there:

Write failed: Broken pipe

Son of a bitch! And why the hell don’t I remember to vi in screen until moments like this?!?

Well, unless I keep ‘top’ open or run a while [ 1 ]; do echo -n '';sleep 30; done, it continues to drop out without fail. And an interesting (to me) fact that I’ve actually recorded: I spend more than 60% of my day on the command line.

Logically, the first things I tried were to add /etc/ssh/ssh_config parameters for both KeepAlive and TCPKeepAlive, but that still had no positive effect. Then I started to dig deeper into the issue to see what other options I had. There were no network problems or abnormally-high numbers of dropped packets or shards, it would happen regardless of whether it was WiFi, 3G, or LAN cabled, and all other network services and applications were working just fine — including things like telephony, which was perfectly clear. I knew that it had to be a timeout issue, and since it wasn’t restricted to just a single server (or even to just thirty or forty servers, for that matter), nor was it an issue until I [finally] switched from Mandriva to Ubuntu, it had to be a local problem.

I dug and dug and dug, almost all the way to Virtual China, and finally found my Holy Grail:

ServerAliveInterval

Right now, I’m using ServerAliveInterval 120 and, for the first time since the issue reared its ugly head, I’ve been able to keep SSH sessions open and idle overnight. Hoorayings for Internets funs again and stuffs! Now maybe I can stop losing time on this and go back to only dealing with the issue of my mouse getting stuck between screens with Xinerama

Share

Leave a Reply

Your email address will not be published. Required fields are marked *