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SSH problems on ubuntu virtual machine

post #1 of 7
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I'm currently running Ubuntu 11.04 on VMWare Player and use ssh to do homework. Occasionally though the ssh just freezes up and I can't do anything. If I open up a new terminal and ssh back into my school's servers it works fine, but my other windows are still frozen. I haven't ever experienced this problem using putty or using the terminal on my macbook pro. It's not a huge deal but it can be annoying when you're editing a program and you make a bunch of changes and it freezes before you can save it. Anyone else have any similar problems or have any idea if there's anything I can do to fix this? Thanks.
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post #2 of 7
could be a virtual machine problem, as i am currently having no problems running ssh on a native install of ubuntu 11.04.

when you say your "my other windows are still frozen" what do you mean? could you elaborate a bit more, the DM isn't frozen i take it? since you can open up another terminal, so the previous terminal is frozen and can't be moved or closed? or all windows (including things like browsers, word processors, email clients, etc) that were open at the time of the "freeze".
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post #3 of 7
sounds like a VM issue... get a clock that shows seconds and watch it when it freezes, if your skipping seconds (common problem) or if the clock freezes, its gonna be a problem with your host running the VM... you COULD try just using a different distro since its just a VM

or you could just try virtualbox instead of vmware player... they really are both quite nice
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post #4 of 7
Thread Starter 
Quote:
Originally Posted by transhour View Post
could be a virtual machine problem, as i am currently having no problems running ssh on a native install of ubuntu 11.04.

when you say your "my other windows are still frozen" what do you mean? could you elaborate a bit more, the DM isn't frozen i take it? since you can open up another terminal, so the previous terminal is frozen and can't be moved or closed? or all windows (including things like browsers, word processors, email clients, etc) that were open at the time of the "freeze".
Well the terminal window isn't frozen, I can move it around and close it and whatnot, but I can't move the cursor inside the terminal. It's most likely a vmware player issue. I am running an older version so I can fold -bigadv because apparently the newer vmware player versions don't work for -bigadv folding.
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post #5 of 7
Quote:
Originally Posted by superhead91 View Post
Well the terminal window isn't frozen, I can move it around and close it and whatnot, but I can't move the cursor inside the terminal. It's most likely a vmware player issue. I am running an older version so I can fold -bigadv because apparently the newer vmware player versions don't work for -bigadv folding.
this is what ssh does when the network has died. when it gets into that state, can you pull up another terminal on the host and ping the guest? can you telnet to port 22?

if not, something is a miss with your network setup.

It's kind of unlikely for a vm network to be up and then down, but that's really what it sounds like. Perhaps another process or your input is disturbing something.
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post #6 of 7
Thread Starter 
I can bring up another terminal and ssh back in and it works fine, but the frozen ssh terminal is still unresponsive. The new one works fine though... Idk. It's weird.
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post #7 of 7
alright well, i still vote for network problem. If the connection goes offline for a long enough period of time it will end up like that. It may be coming and going at will.

Do you know about the ~ character in the ssh client to mess with it? Check

$ man ssh

and see the part about escape characters


If you setup

$ ping guest > log.txt &

in the background before/during/after your client dies, do you always get 0% loss or is it cutting out for a bit in the middle?

Again I realize this is a local tap VM setup, so network outage doesn't make much sense at all, but based on the symptoms of your client, that's what I'd start with. The VM network can be a bit tricky to get setup right, but it should either work 100% or 0%. I can't imagine it would be 95% unless you or another process is unknowingly disturbing it in the background.
Edited by lloyd mcclendon - 5/3/11 at 6:30pm
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