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000174_72027.3605@compuserve.com_Fri Apr 2 10:55:18 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!washdc3-snh1.gtei.net!news.gtei.net!ngpeer.news.aol.com!news.compuserve.com!news-master.compuserve.com!not-for-mail
From: "Bob Bailin" <72027.3605@compuserve.com>
Newsgroups: comp.unix.sco.misc,comp.protocols.kermit.misc
Subject: Re: SSH errors with 'File or directory does not exist' but only if more that 10 users are logged in
Date: Fri, 2 Apr 2004 06:44:55 -0500
Organization: CompuServe Interactive Services
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References: <1080768113.45686.0@demeter.uk.clara.net> <slrnc6me86.pfr.fdc@sesame.cc.columbia.edu> <1080856078.14863.0@iris.uk.clara.net>
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"David McCormack" <nospam@zamang.co.uk> wrote in message
news:1080856078.14863.0@iris.uk.clara.net...
> "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.
Trying bumping up the shared memory parameters. One of them SHMMAX is
only 10 by default.
Bob