Part II: Open NX on Mint 14: Error: Unexpected termination of nxssh

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I'm running Mint 14 Cinnamon at home.

I would like to use my desktop at work, which is running RHEL 5.1 with
NoMachine version 3.*.

I am told NoMachine version 4 is incompatible with version 3, and version 3
seems to be unavailable.  Does anyone know where to get a copy of version
3?  I haven't found one, so I decided to install Open NX on my Mint 14
computer at home.

My problem with Open NX is that I get this error message when I try to
connect:

Error: Unexpected termination of nxssh

I think this error may have to do with the Open NX looking for paths that
may not be there in Mint 14.

I read via a result from a Google search that Mint 14 is based off of
Ubuntu 12.10.

So, I used the instructions for Debian based distros posted here:
http://opennx.sourceforge.net/download.html

I ran this command
wget -O -
http://download.opensuse.org/repositories/home:/felfert/Debian_6.0/Release.key|
apt-key add -

Then I added this into a file in /etc/apt/sources.list.d/
deb http://download.opensuse.org/repositories/home:/felfert/xUbuntu_12.10 ./

I then ran this command:
apt-get update; apt-get install opennx

None of the menu entries for Open NX did anything when I clicked on them in
my menu.  I looked at the properties of the Open NX client icon and found
that the command was:
/usr/NX/bin/opennx

That path does not exist on my machine, only
/usr/NX
does

I tried rerunning the installation and got this message:
opennx is already the newest version.

I went into Synaptic Package Manager and it gave me this list of
installation directories for Open NX:

/.
/usr
/usr/NX
/usr/bin
/usr/bin/nxclient
/usr/lib
/usr/lib/opennx
/usr/lib/opennx/bin
/usr/lib/opennx/bin/nxproxy
/usr/lib/opennx/bin/nxssh
/usr/lib/opennx/bin/opennx
/usr/lib/opennx/bin/pconnect
/usr/lib/opennx/bin/watchreader
/usr/lib/opennx/lib
/usr/lib/opennx/lib/libXcomp.so.0
/usr/lib/opennx/lib/libXcomp.so.0.0.0
/usr/lib/opennx/share
/usr/share
/usr/share/doc
/usr/share/doc/opennx
/usr/share/doc/opennx/changelog.Debian.gz
/usr/share/doc/opennx/changelog.gz
/usr/share/doc/opennx/copyright
/usr/share/opennx
/usr/share/opennx/applnk
/usr/share/opennx/applnk/xdg
/usr/share/opennx/applnk/xdg/innovidata-opennx-admin.desktop
/usr/share/opennx/applnk/xdg/innovidata-opennx-wizard.desktop
/usr/share/opennx/applnk/xdg/innovidata-opennx.desktop
/usr/share/opennx/applnk/xdg/innovidata-opennx.directory
/usr/share/opennx/cups
/usr/share/opennx/cups/mime.convs
/usr/share/opennx/cups/mime.types
/usr/share/opennx/icons
/usr/share/opennx/icons/128x128
/usr/share/opennx/icons/128x128/apps
/usr/share/opennx/icons/128x128/apps/nx.png
/usr/share/opennx/icons/128x128/apps/opennx-admin.png
/usr/share/opennx/icons/128x128/apps/opennx-wizard.png
/usr/share/opennx/icons/128x128/mimetypes
/usr/share/opennx/icons/128x128/mimetypes/nx-desktop.png
/usr/share/opennx/icons/16x16
/usr/share/opennx/icons/16x16/apps
/usr/share/opennx/icons/16x16/apps/nx.png
/usr/share/opennx/icons/16x16/apps/opennx-admin.png
/usr/share/opennx/icons/16x16/apps/opennx-wizard.png
/usr/share/opennx/icons/16x16/mimetypes
/usr/share/opennx/icons/16x16/mimetypes/nx-desktop.png
/usr/share/opennx/icons/256x256
/usr/share/opennx/icons/256x256/apps
/usr/share/opennx/icons/256x256/apps/nx.png
/usr/share/opennx/icons/256x256/apps/opennx-admin.png
/usr/share/opennx/icons/256x256/apps/opennx-wizard.png
/usr/share/opennx/icons/256x256/mimetypes
/usr/share/opennx/icons/256x256/mimetypes/nx-desktop.png
/usr/share/opennx/icons/32x32
/usr/share/opennx/icons/32x32/apps
/usr/share/opennx/icons/32x32/apps/nx.png
/usr/share/opennx/icons/32x32/apps/opennx-admin.png
/usr/share/opennx/icons/32x32/apps/opennx-wizard.png
/usr/share/opennx/icons/32x32/mimetypes
/usr/share/opennx/icons/32x32/mimetypes/nx-desktop.png
/usr/share/opennx/icons/48x48
/usr/share/opennx/icons/48x48/apps
/usr/share/opennx/icons/48x48/apps/nx.png
/usr/share/opennx/icons/48x48/apps/opennx-admin.png
/usr/share/opennx/icons/48x48/apps/opennx-wizard.png
/usr/share/opennx/icons/48x48/mimetypes
/usr/share/opennx/icons/48x48/mimetypes/nx-desktop.png
/usr/share/opennx/icons/512x512
/usr/share/opennx/icons/512x512/apps
/usr/share/opennx/icons/512x512/apps/nx.png
/usr/share/opennx/icons/512x512/apps/opennx-admin.png
/usr/share/opennx/icons/512x512/apps/opennx-wizard.png
/usr/share/opennx/icons/512x512/mimetypes
/usr/share/opennx/icons/512x512/mimetypes/nx-desktop.png
/usr/share/opennx/icons/scalable
/usr/share/opennx/icons/scalable/apps
/usr/share/opennx/icons/scalable/apps/nx.svg
/usr/share/opennx/icons/scalable/apps/opennx-admin.svg
/usr/share/opennx/icons/scalable/apps/opennx-wizard.svg
/usr/share/opennx/icons/scalable/mimetypes
/usr/share/opennx/icons/scalable/mimetypes/nx-desktop.svg
/usr/share/opennx/keyboards
/usr/share/opennx/keys
/usr/share/opennx/keys/server.id_dsa.key
/usr/share/opennx/locale
/usr/share/opennx/locale/de
/usr/share/opennx/locale/de/LC_MESSAGES
/usr/share/opennx/locale/de/LC_MESSAGES/opennx.mo
/usr/share/opennx/locale/ja
/usr/share/opennx/locale/ja/LC_MESSAGES
/usr/share/opennx/locale/ja/LC_MESSAGES/opennx.mo
/usr/share/opennx/locale/ru
/usr/share/opennx/locale/ru/LC_MESSAGES
/usr/share/opennx/locale/ru/LC_MESSAGES/opennx.mo
/usr/share/opennx/pconnect.html

After looking that list over I successfully started Open NX ( the title on
the client window ) via this command:
/usr/bin/nxclient

I was then able to put my credentials into the Open NX client, but when I
tried to connect I got this error message
unexpected termination of nxssh

I tried running /usr/bin/nxclient with the -- verbose option from the
command line to get more feedback, but I got none.  All I got was this
ouput from the Open NX runlog:

===============================
07:00:09 AM: env:
PATH='/usr/lib/opennx/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games'
07:00:09 AM: env: NX_HOME='/home/steve'
07:00:09 AM: env: NX_ROOT='/home/steve/.nx'
07:00:09 AM: env: NX_SYSTEM='/usr/lib/opennx'
07:00:09 AM: env: NX_CLIENT='/usr/lib/opennx/bin/opennx'
07:00:09 AM: env: NX_VERSION='3.3.0'
07:00:09 AM: env: XAUTHORITY='/home/steve/.Xauthority'
07:00:09 AM: env: NX_TEMP='/tmp'
07:00:09 AM: Starting /usr/lib/opennx/bin/nxssh -nx -x -2 -p 22 -o
'RhostsAuthentication no' -o 'PasswordAuthentication no' -o
'RSAAuthentication no' -o 'RhostsRSAAuthentication no' -o
'PubkeyAuthentication yes' -i /usr/lib/opennx/share/keys/server.id_dsa.key
-B -E nx@http://nco-lw-srussell.ncep.noaa.gov
07:00:11 AM: Error: Unexpected termination of nxssh
================================

I ran a Google search on my error message.  It seems it can be a number of
problems and I am not an expert in these things so I was hoping that
someone here could give me a clue on how to get Open NX running so I don't
lose a day's pay with the next snow storm :)

Thanks in advance for any information.

Steve