Machines names for nx client and ssh access.
The hostnames for logging into the EE computers via ssh or NX are listed below:
VLSI Lab (1218 Mudd) - vlsi1.cisl.columbia.edu - vlsi18.cisl.columbia.edu
ILAB Lab (1235 Mudd) - micro1.ilab.columbia.edu - micro17.ilab.columbia.edu
1227 Mudd Host names - circuit1.cisl.columbia.edu - circuit12.cisl.columbia.edu
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ssh and X11
The design of the X Protocol specifies a client-server relationship between an application and its display. In X, the software that manages a single screen, keyboard and mouse is known as an X server.
A client is an application that displays on the X server and is usually termed an X client or simply the application. The X client sends requests to the X server, for example a drawing or information request. The X server accepts requests from multiple clients and returns to the X client replies for information requests, user input and errors.
Faster and more responsive X11 GUI. The Nomachine client and server are able to accomplish this by selectively caching elements of the screen that do not change, heavily compressing screen attributes that do need to be refreshed and sending requests and updates in a bulk fashion between the client and server.
Users can suspend their sessions and resume them at a later date. This means that students can keep their Cadence sessions open on the nxserver and resume them from where they left off.
Windows clients no longer need to install Cygwin or xceed in order to use Cadence on their Windows desktops. Instead students install a small binary client application which takes a fraction of the time that Cygwin takes to install.
Full gnome session automatically. This means that when logging into the nxserver students don't have to start up xclients individually, they will get a complete gnome session.
Compressed X11 Sessions Using Nomachine's SSH client and server
We are pleased to announce that the EE department will begin offering a new remote access technology for the cisl and ilab hosts in 1218 and 1235 Mudd, or more commonly known as the ILAB and VLSI computer labs. The new technology provides the following advantages over the existing X11 mechanisms that we have been using up until this point.
APPLY FOR AN ILAB/VLSI ACCOUNT - To set this up, first you must already have an EE account for the machines in 1218 and 1235 Mudd. If you do not have an ILAB or VLSI lab account, please email me at with your uni and the EE class that you are a member of.
- DOWNLOAD AND INSTALL THE NOMACHINE CLIENT AND FONTS -
Go to http://www.nomachine.com/download.php,
download and install the client and the fonts that are appropriate for
your platform. The fonts can be downloaded from the add-on section
right below the nxclient download on the the nxclient download page.
The font downloads are labeled nxfonts-xxx. If you do not install the
fonts for a Windows installation, Cadence will not run because it does
not have the fonts that it needs to start up. You will see an error
that says "X Error of failed request: BadName (named color or font does
not exist)" if you have not installed the correct fonts. The Windows
client is incompatabile with some versions of Cygwin, so you should
make sure that your Cygwin version is compatabile before proceeding.
You can read this post if you would like to learn about Cygwin
- DOWNLOAD AND CONFIGURE THE CLIENT KEYS - Using WinScp or scp download the ilab.key file from the home directory of your ilab or vlsi account
to your desktop. Then, either
type /usr/bin/nxclient --wizard from a linux host or go to start ->
run -> NX connection wizard in Windows. When the wizard
prompts you to enter the name of a host, enter one of names of the
hosts outlined in ilab-hosts file in your home directory
Keep the port set to 22. Name the session whatever you
- CONFIGURE NXCLIENT SETTINGS - After finishing the wizard you will see the logon dialog. Click on the button that
is labelled Configure... Under the Advanced tab, check the
Enable SSL encryption box in the network section. Under the
General Tab, under Desktop, make sure that you are using UNIX and GNOME for your settings and for now set the Display screen area to
800x600. I have had better luck resuming sessions on different
machines if I set the screen area to a lower value. Click on the
key... button. Highlight the existing key and delete it within the
text box. Click import and ilab.key file that you just downloaded to
your desktop. Click Save until you
are back at the logon menu. Enter the user name and password that
you normally use to log on to the 1218 and 1235 machines and click
login. You should get a new X session.
To suspend the session, click on the X on the upper right hand corner of the window and select suspend, when it prompts you to terminate or suspend your session.
- Please be very careful while using this software. Some parts of it
are still unpolished and cause sessions to hang and become
unrecoverable from a suspend. In other words save your work often and
don't depend on the suspend feature. Please use it to complement your
other remote access methods such as x-win32 and cygwin.
For more information concerning gui remote access methods consult please consult the following document.
For more information concerning nx please consult the following documents
You may already have a commercial software package called X-Win 32 on your computer that permits the EE servers to display graphics over a remote connection. If this is the case, launchX-Win 32, right click on the system tray icon, and start the X-Config tool. When setting upa new SSH session with the tool, specify /usr/X11R6/bin/xterm -ls as the command to run. When you restart X-Win 32, it should automatically start up a terminal session on the remote server from within which you can run remote applications.back to top
If you do not have X-Win 32, you can use the free Cygwin package. Install Cygwin by down-
loading and running http://www.cygwin.com/setup.exe. During the installation, you will
be prompted to select various software packages. Make sure to select the X11 package
and (in the Network category) the openssh package. After installation, start Cygwin ei-
ther by clicking on the shortcut installed on your desktop or by selecting the menu option
Start/Programs/Cygwin/Cygwin Bash Shell. Run the command startxwin.bat from
the prompt; another terminal window should subsequently appear. Login to the lab machines
from within this window as described below.
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