How to gain Remote Access to the CVL over the Internet

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==A (very brief) introduction to graphics on Linux/Unix machines like the CVL==
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To log into and use the CVL machines, you must first create an [[https://computing.ece.vt.edu/accounts ECE account]]
While working on a project from home or from another location on campus, it is possible to access the programs contained in the CAD and Visualization Lab.  This generally comes in either command-line form directly, or as a graphical application that is launched via the command-line.  The command-line is also called a "shell" in Unix-speak.  There are many different tutorials available on the net to familiarize yourself with the basic file operations that can be performed via the command-line shell.  A few examples can be found in this [http://www.ee.surrey.ac.uk/Teaching/Unix/ UNIX / Linux Tutorial for Beginners], or this [http://partmaps.org/era/unix/shell.html Introduction to the Unix Shell].  Fortunately, not very many of these command-line utilities are required to access and use the software installed in the CVL.  Generally, only the basics of listing the files (ls) in your home directory, making project directories (mkdir), moving files in and out of those directories (mv) are only basic operations required.
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<br> The program called "Secure Shell" or SSH is the supported way of connecting to a command-line shell on the CVL from another machine.  This establishes a secure, encrypted connection to a command shell ona remote machine, has wide support on many operating systems, and even allows file transfers over the same encrypted channel.
 
  
<br> Applications on Unix are not restricted to command-line programs.  The Unix standard for graphical applications is called "X-windows," or just "X" for short. In fact, the graphics capabilities of this X-windows system are much more flexible than in Windows or MacOS because they allow for interacting (viewing windows, buttons, pointing, clicking, etc) on a different machine than is actually running the application.  All that is required to do this is a network connection between the two, and what's referred to as an "X-server" on the machine that the user physically viewing the windows and manipulating the mouseThis "client/server" naming convention seems backwards in that the "server" runs on the workstation (e.g. your Windows laptop), and the "client" is the application running on the CVL (e.g. Matlab).  Linux clients generally have this X-server installed, but Windows users have to install one if graphical access to the CVL is required.
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==An introduction to graphics on Linux/Unix machines like the CVL==
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*You can access the programs contained in the CAD and Visualization Lab while working on a project from home or campus.  This generally comes in either command-line form or as a graphical application that is launched via the command-line (called a "shell" in Unix-speak).  
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There are many tutorials from which you can familiarize yourself with the basic file operations that can be performed via the command-line shell. Fortunately, not very many of these command-line utilities are required to access and use the software installed in the CVLGenerally listing the files (ls) in your home directory, making project directories (mkdir), and moving files in and out of the directories (mv) are the only operations required.
  
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::*Here are some examples of tutorials:
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:::'''[http://www.ee.surrey.ac.uk/Teaching/Unix/ UNIX / Linux Tutorial for Beginners]'''
  
==Accessing the CVL Remotely from a Windows Operating System==
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*The program called "Secure Shell" (SSH) is the supported way of connecting to a command-line shell on the CVL from another machine.  This establishes a secure, encrypted connection to a command shell on a remote machine, which has wide support on many operating systems, and even allows file transfers over the same encrypted channel.
  
In order to accomplish this you must have a SSH client and a X windows server installed on your Windows machine. ECE supports PuTTY as our SSH client and Cygwin/X as our X windows server.
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*Applications on Unix are not restricted to command-line programs.
  
<br>To download, install, and setup these programs follow these short tutorials.
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::*The Unix standard for graphical applications is called "X-windows," or just "X" for short.  In fact, the graphics capabilities of this X-windows system are much more flexible than in the Windows or MacOS because they allow for interactions (viewing windows, buttons, pointing, clicking, etc) on a different machine than the one running the application.  All that is required is a network connection between the two, and what's referred to as an "X-server" on the machine that allows the user to physically view the windows and manipulate the mouse.  This "client/server" naming convention seems backwards in that the "server" runs on the workstation (e.g. your Windows laptop), and the "client" is the application running on the CVL (e.g. Matlab).  Linux clients generally have this X-server installed, but Windows users have to install one if graphical access to the CVL is required.
  
<br>[[PuTTY]] tutorial
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==Accessing the CVL Remotely from a Windows Operating System==
<br>[[Cygwin/X]] tutorial
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<br>At the end of the Cygwin Tutorial you will be given the instructions on how to access the CVL remotely.  For step-by-step instructions, see [[RemoteAccess.docx]].
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*In order to access the CVL from a Windows system, you must have a SSH client and a X-windows server installed on your Windows machine.
  
<br> In order to copy files (e.g. Matlab scripts, data files for processing, etc), you can transfer files to and from your CVL account using a program similar to SSH for transferring files.  One very simple application that can be used is called WinSCP.  The [http://winscp.net/ WinSCP homepage] has either a full installation package, or just a single executable file on its [http://winscp.net/eng/download.php download page].
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*We support [[MobaXterm]] as our putty and X-windows server. This program also allows you to copy and transfer files to and from your ECE account and your local machine.
  
 
==Accessing the CVL Remotely from a Unix Based Operating System==
 
==Accessing the CVL Remotely from a Unix Based Operating System==
  
To access the CVL from a Unix system just open a terminal and type:
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'''1.''' To access the CVL from a Unix or Mac OS X system just open a terminal and type:
  
 
   ssh -X cvl.ece.vt.edu
 
   ssh -X cvl.ece.vt.edu
  
Use the user name and password that you created from the CVL Account creation page.
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if the username of your local machine is not the same as your ECE USERNAME, use,
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  ssh -X ECEUSERNAME@cvl.ece.vt.edu
  
To copy files to your home directory on the CVL use the command
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'''2.''' Use the user name and password that you created from the CVL Account creation page.
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'''3.''' To copy files to your home directory on the CVL use the command:
  
 
   scp -r myfile cvl.ece.vt.edu:
 
   scp -r myfile cvl.ece.vt.edu:
  
or, to get "myfile" from your home directory on the CVL, the command  
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'''Or''': to get "myfile" from your home directory on the CVL, use the command:
  
 
   scp -r cvl.ece.vt.edu:myfile ~
 
   scp -r cvl.ece.vt.edu:myfile ~
  
will copy them to your home directory on your local machine.
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The files will be copied to your home directory on your local machine.
 
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Click here to return to the [[Main Page]]
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[[Main Page]]

Latest revision as of 12:51, 19 November 2015

To log into and use the CVL machines, you must first create an [ECE account]


[edit] An introduction to graphics on Linux/Unix machines like the CVL

  • You can access the programs contained in the CAD and Visualization Lab while working on a project from home or campus. This generally comes in either command-line form or as a graphical application that is launched via the command-line (called a "shell" in Unix-speak).

There are many tutorials from which you can familiarize yourself with the basic file operations that can be performed via the command-line shell. Fortunately, not very many of these command-line utilities are required to access and use the software installed in the CVL. Generally listing the files (ls) in your home directory, making project directories (mkdir), and moving files in and out of the directories (mv) are the only operations required.

  • Here are some examples of tutorials:
UNIX / Linux Tutorial for Beginners
  • The program called "Secure Shell" (SSH) is the supported way of connecting to a command-line shell on the CVL from another machine. This establishes a secure, encrypted connection to a command shell on a remote machine, which has wide support on many operating systems, and even allows file transfers over the same encrypted channel.
  • Applications on Unix are not restricted to command-line programs.
  • The Unix standard for graphical applications is called "X-windows," or just "X" for short. In fact, the graphics capabilities of this X-windows system are much more flexible than in the Windows or MacOS because they allow for interactions (viewing windows, buttons, pointing, clicking, etc) on a different machine than the one running the application. All that is required is a network connection between the two, and what's referred to as an "X-server" on the machine that allows the user to physically view the windows and manipulate the mouse. This "client/server" naming convention seems backwards in that the "server" runs on the workstation (e.g. your Windows laptop), and the "client" is the application running on the CVL (e.g. Matlab). Linux clients generally have this X-server installed, but Windows users have to install one if graphical access to the CVL is required.

[edit] Accessing the CVL Remotely from a Windows Operating System

  • In order to access the CVL from a Windows system, you must have a SSH client and a X-windows server installed on your Windows machine.
  • We support MobaXterm as our putty and X-windows server. This program also allows you to copy and transfer files to and from your ECE account and your local machine.

[edit] Accessing the CVL Remotely from a Unix Based Operating System

1. To access the CVL from a Unix or Mac OS X system just open a terminal and type:

  ssh -X cvl.ece.vt.edu

if the username of your local machine is not the same as your ECE USERNAME, use,

  ssh -X ECEUSERNAME@cvl.ece.vt.edu

2. Use the user name and password that you created from the CVL Account creation page.

3. To copy files to your home directory on the CVL use the command:

  scp -r myfile cvl.ece.vt.edu:
Or: to get "myfile" from your home directory on the CVL, use the command: 
  scp -r cvl.ece.vt.edu:myfile ~

The files will be copied to your home directory on your local machine.


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