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000172_nospam@zamang.co.uk_Thu Apr 1 17:18:17 2004.msg
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Path: newsmaster.cc.columbia.edu!iad-feed.news.verio.net!peer1.stngva01.us.to.verio.net!news.verio.net!newsfeed.vmunix.org!uio.no!news.tele.dk!news.tele.dk!small.news.tele.dk!lnewsoutpeer00.lnd.ops.eu.uu.net!lnewsinpeer01.lnd.ops.eu.uu.net!emea.uu.net!mephistopheles.news.clara.net!news.clara.net!iris.uk.clara.net
From: "David McCormack" <nospam@zamang.co.uk>
Newsgroups: comp.unix.sco.misc,comp.protocols.kermit.misc
References: <1080768113.45686.0@demeter.uk.clara.net> <slrnc6me86.pfr.fdc@sesame.cc.columbia.edu>
Subject: Re: SSH errors with 'File or directory does not exist' but only if more that 10 users are logged in
Date: Thu, 1 Apr 2004 22:48:02 +0100
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"Frank da Cruz" <fdc@columbia.edu> wrote in message
news:slrnc6me86.pfr.fdc@sesame.cc.columbia.edu...
> On 2004-03-31, David McCormack <nospam@zamang.co.uk> wrote:
>
> : I'm using a downloaded binary version of ckermit version 8.0.209 on a
> : SCO OpenServer box (v. 5.0.6). The kermit executable was downloaded
> : from the main http://www.columbia.edu/kermit/ web site.
> :
> : If we have 10 or more than users logged in to our SCO OpenServer box
> : (but only one is running kermit) then kermit will fail to run the
external
> : ssh client. The error that gets displayed is;
> :
> :: No such file or directory
> : Can't connect to ssh -e none -l root <hostname>
> :
> : If you have 9 users connected then ssh gets run correctly. This is with
> : exactly the same configuration file. What is bizarre is that if 9 people
> : are logged in you are running kermit, ssh will work. If 10th user logs
> : in, whilst you're in kermit, ssh will fail. If the number of users
> : connected goes back down to 9 or less, ssh will start working again.
> :
> : Does anyone have any ideas what's causing this or what areas I should
> : check? It seems more SCO related then kermit though.
>
> Sounds like you're running out of PTYs (pseudoterminals). I imagine there
> is a way to create more, but I'm not an OSR5 sysadmin expert.
Not sure if a previous attempt to send this message worked as I've been
having problems with my news server, but just in case.
Altering the number of PTYs available from 96 to 256 made no difference.
I've been looking around at some possible other ideas of which limitation in
SCO I'm running across. It's not linked to the ttyp device as I've been on
ttyp14 and it still only works if there are less than 10 people logged in.
The only thing I can find that appears it could have an effect are
somethings called 'semophores' that are used for inter-task communication
occuring to a Google search.
Kind of flying blind on this though as I can't see any messages in any of
the log files as to any problems.
David McCormack