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permalink · #1 (**permalink**) 02-15-2008, 02:01 PM

"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

permalink · #2 (**permalink**) 02-15-2008, 02:01 PM

On 2004-04-01, David McCormack <nospam@zamang.co.uk> wrote:
: ...
: 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.
:
Let's hope some SCO expert can shed some light.

: Kind of flying blind on this though as I can't see any messages in any of
: the log files as to any problems.
:
Have you tried taking a debug log in Kermit? ("log debug", then give a
an ssh command that fails, then "close debug", then send the resulting
debug.log file to kermit-support@columbia.edu).

- Frank

permalink · #3 (**permalink**) 02-15-2008, 02:01 PM

"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

permalink · #4 (**permalink**) 02-15-2008, 02:04 PM

"Bob Bailin" <72027.3605@compuserve.com> wrote in message
news:c4jjk6$agk$2@ngspool-d02.news.aol.com...
>
> "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.

Sorry for the delay in replying I've not been about to get access to the
server. I've checked and SHMMAX is set to 524288 on the machine.

SHMMAX: maximum shared memory segment size (bytes).
The current value is: 524288 New value is:

SHMMIN: minimum shared memory segment size (bytes).
The current value is: 1 New value is:

XSDSEGS: number of XENIX shared data segments (systemwide).
The current value is: 25 New value is:

XSDSLOTS: number of slots per XENIX shared data segment.
The current value is: 3 New value is:

I've been through the other options within Tune Parameters in scoadmin and
none of them are set to 10.

Many thanks for your suggestions

David McCormack

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Re: SSH errors with 'File or directory does not exist' but only if more that 10 users are logged in