Getting Started on Velocity

Windows Login Machines

A more detailed version of the information below is available in the Accessing CTC Machines document.

Via any Remote Desktop method

Using a remote desktop gives you full windows desktop functionality from your machine. A new desktop window provides access to all of the software on the login machines with a GUI interface or from the command prompt.

When you connect to a login machine using a remote desktop connection, you will see your desktop on that login machine.

Once you are connected, you can navigate to your files in either of two ways:

1. Double-click on the icons
   
   My Computer | H: | Users | your_userid
2. From the Start menu at the lower left, choose
   
   All Programs | Accessories | Command Prompt
   

Batch machines: Once you have established a remote desktop connection to a login machine, you can use a remote desktop connection to connect to a batch machine on which you have a running job. You cannot use telnet.  To leave the batch machine, type logoff or shutdown -l at a command prompt.

Warning: If you use a remote desktop connection, be sure to log off the system rather than just closing the window. If you simply close the window, you will stay connected, using system resources. If you inadvertently close the window, simply reconnect and log off properly.

Note: When remote desktop is used in full-screen mode, you'll see a tab across the top of the screen.  Look at the push pin icon on the left; if it looks pushed in, the tab will remain visible.  If not, the tab will recede; to get it back, move your cursor to the top of the screen.  To toggle between these modes, click on the push pin.

1. . . . via Remote Desktop Connection
   
   Remote Desktop connection allows you to connect to a terminal server or another machine running windows.
   
   Requirements: Windows XP
   
   Start | All Programs | Accessories | Communications | Remote Desktop Connection
2. . . . via Remote Desktop Web Connection
   
   You can connect to the login machines through a web page.
   
   Requirements: Windows and Internet Explorer
   
   More about TSWeb
   
   Connect to TSWeb
3. . . . via other Remote Desktop client
   
   If you use Windows 95, 98, NT, or 2000: You will need to download the Microsoft Remote Desktop Client before you can use it.
   
   If you use a Mac:
   Free download from http://www.microsoft.com/mac/download/misc/RDC.asp. Works just like the Remote Desktop Connection in Windows XP. Requires Mac OS X version 10.2.8 or higher
   
   If you use a non-Windows platform:
   You will need the rdesktop client. If you are running Linux, typically it is part of the distribution. If you prefer to build it yourself, it is available for downloading from http://www.rdesktop.org/. Executables are available from http://www.jacco2.dds.nl/rdesktop/index.html.

Via SSH

If you do not come in on a secure connection, there is a danger that your userid and password can be intercepted by someone listening on the network. Telnet is not secure and has been disabled as a means of accessing the login machines. It sends clear text passwords over the network.  Use an SSH client so that you can establish a secure connection before accessing the login nodes.

• The login machines are SSH servers.
• The section on SSH in Accessing CTC Machines describes download and use of an SSH client.
• SSH from any platform to get a command prompt on one of the login nodes:
  
  ssh winlogin1.tc.cornell.edu

Linux Login Machines

Via SSH

If you do not come in on a secure connection, there is a danger that your userid and password can be intercepted by someone listening on the network. Use an SSH client so that you can establish a secure connection before accessing the login nodes.

• The Linux login machines are SSH servers.
• SSH from any platform to get a command prompt on one of the login machines:

  ssh linuxlogin1.tc.cornell.edu

• Most clients support a -X option (or similar) to enable X11 forwarding if you need it.

putty -X linuxlogin1.tc.cornell.edu

• The section on SSH in Accessing CTC Machines describes download and use of various SSH clients for Windows, such as PuTTY.
• Special note for batch: You can use ssh to connect to a batch machine on which you have a running job. To leave the batch machine, type exit or ctrl-D at the prompt.

Your Turn

Try it! | TSWeb | Remote Desktop Connection | ssh to Linux machine

Now that we're logged in, Windows users can try a command from the first section:

Try it! | vsched -pa

Stay logged in.