Accessing the Workshop cloud computing environment

On this page:

Quick start

Changing your password

Change your password through the web by going to , and clicking on the 鈥淧assword change鈥� card, or by going directly to .

Command line access

Use your preferred SSH client
Or use the web based ssh client at
Connect to workshop.colorado.edu with your preferred SSH client (the web client automatically connects to the appropriate server)
Login with your Workshop username and password

RStudio

Connect to the cloud environment landing page at and click on the 鈥淩studio鈥� card
Or connect directly to
Login with your provided username and password, or your new password if you changed it

Detailed Instructions

Here is a brief video walk through for accessing the cloud computing environment.

RStudio Server

RStudio Server is an R development environment that is accessed with a web browser. All of the R based practicals will be done with RStudio Server running in the Workshop cloud environment. RStudio can also be used to edit and view files in the Workshop cloud environment.

Using a computer with an up to date web browser, go to and click on the 鈥淩studio鈥� card
Or go directly to
Login with your provided username and password, or your new password if you changed it

RStudio authentication page

RStudio page

Using RStudio to create an empty text file

Command line access

Some of the practicals require command line access to the Workshop cloud environment. Command line access is obtained using the SSH protocol. There are many 鈥淪SH clients鈥�, which are programs used to make SSH connections. If you have preferred one, then use that one.

The Workshop cloud environment is setup so that connections to workshop.colorado.edu are spread out to the different compute nodes in the cloud. When logged in your command prompt will appear similar to

username@ip-10-0-201-180:~$

which means you are logged into a cloud node at the private address 10.0.201.180. Repeated logins may or may not connect to the same node. Which node you connect to is not important, as all files and programs are available from every node.

Web based SSH

A web based SSH client has been provided. It automatically connects to the Workshop cloud computing environment. To access the web based SSH client go to and click on the 鈥淪SH鈥� card, or go directly to the SSH page at .

The web based SSH client requires no additional software (other than a web browser) on your local computer, but you must keep the browser and tab open for the entire time you want to use the command line.

Apple macOS and Linux

These instructions apply to all versions of macOS and distributions of Linux.

Builtin SSH client

Linux and macOS come with a builtin SSH client that is run from the command line.

demonstrating using SSH from a Mac Terminal window is available.

Open a terminal window
1. On macOS, use Spotlight to search for the program terminal and run it, or find it under Applications -> Utilities -> Terminal
2. On Linux, open a terminal such as gnome-terminal, konsole, xfce4-terminal, or any of many others
At the command prompt type ssh @workshop.colorado.edu
1. Where is the Workshop username that you have been provided
2. For example, if your username is 鈥渟tudent12鈥� then type ssh student12@workshop.colorado.edu
The first time you connect you will be asked to verify workshop.colorado.edu. See the SSH fingerprints section for information. It is generally safe to answer yes.

Microsoft Windows 10 and 11

On Windows computers it is recommended that a third party SSH client is used.

PuTTY

demonstrating installing PuTTY and using it to connect to the Workshup cluster is available.

PuTTY is a popular SSH client for Windows (and other operating systems).

Installation
1. Download from
2. You probably want the 鈥淢SI (鈥榃indows Installer鈥�)鈥� 64-bit version
3. It will be a file named putty-64bit-0.76-installer.msi, but possibly with a different version number
Once the file is downloaded, run it to install PuTTY
1. It is safe to accept the default options
2. Click 鈥淣ext鈥� through the install wizard, until it finishes
Using PuTTY
1. By default, PuTTY can be found in the 鈥淪tart鈥� menu under 鈥淧uTTY (64-bit) -> PuTTY鈥�
2. Running PuTTY will open the PuTTY Configuration window
3. Enter workshop.colorado.edu into the 鈥淗ost Name鈥� field
4. Click 鈥淥K鈥�, or press enter
5. The PuTTY Security Alert window will be shown on the first connection. It is usually safe to click 鈥淵es鈥�, but see the SSH fingerprints section for a full explanation.
6. The PuTTY terminal window will open with the promp login as:
7. Enter your Workshop username and password

The PuTTY Configuration window

The PuTTY Security Alert window

The PuTTY terminal window

Bitvise SSH client

demonstrating installing Bitvise and using it to SSH to the Workshop cluster is available.

Bitvise is another popular SSH client for Windows. It is somewhat more complicated to setup than PuTTY, but has more features.

Installation
1. Download from the
2. Click the 鈥淒ownload Bitvise SSH Client installer鈥� button
3. Once the program has downloaded, run it to install the Bitvise SSH client
4. If you agree to the terms of the license then check the box, and click 鈥淚nstall鈥�
5. When the installation completes, click 鈥淥k鈥� to dismiss the installer window
Using Bitvise SSH Client
1. By default, Bitvise SSH Client can be found in the 鈥淪tart鈥� menu under 鈥淏itvise SSH Client -> Bitvise SSH Client鈥�
2. Running it will open the Bitvise SSH Client window
3. Create a profile for workshop.colorado.edu
  1. Click the 鈥淣ew profile鈥� icon
  2. Enter a name for the profile, such as 鈥渨orkshop.colorado.edu鈥�
  3. Enter workshop.colorado.edu into the 鈥淗ost鈥� field
  4. Enter your Workshop username into the 鈥淯sername鈥� field
  5. Click the 鈥淪ave profile鈥� icon
4. When opening a new Bitvise SSH Client session
  1. Click the 鈥淟oad profile鈥� icon
  2. Select the profile you created for the Workshop
5. Once the profile is loaded, click the 鈥淟og in鈥� button at the bottom of the window
6. The first time you connect the 鈥淗ost Key Verification鈥� window will appear
  1. It is usually safe to click 鈥淎ccept and Save鈥�
  2. See the SSH fingerprints section for a full explanation
7. The 鈥淯ser Authentication鈥� window will appear, enter your Workshop password into the 鈥淧assword鈥� field
8. This will create Bitvise terminal and file transfer windows

The Bitvise SSH Client window

Creating the Workshop profile

The Host Key Verification window

The User Authentication window

The Bitvise terminal window

SSH fingerprints

Mostly, you do not need to worry about this, and can take whatever action is necessary to accept the key, such as typing yes, or clicking OK.

The first time you connect to workshop.colorado.edu you will be asked a question similar to:

The authenticity of host 'workshop.colorado.edu (128.138.139.65)' can't be established.
ECDSA key fingerprint is SHA256:7aZtwMf1EfXZEnGYY3bpUErTdLh1LJ3Yq8ka6Zkc53Q.
Are you sure you want to continue connecting (yes/no/[fingerprint])?

The SSH client is asking you to verify the key fingeprint is the unique fingerprint of workshop.colorado.edu. There are several different types of keys, and depending on the SSH client used, a different key might be presented. The key fingerprint table lists all of them.

SSH key fingerprints for `workshop.colorado.edu`

Key	SHA256 Fingerprint
ECDSA	7aZtwMf1EfXZEnGYY3bpUErTdLh1LJ3Yq8ka6Zkc53Q
ED25519	UM89YHOoZlP6vM4Yj0qNg+zx9+POszYjHkMxGjoOO6k
RSA	NT4QhsECMPAOEjl9RtMy9zitUkpmgaqpghKKALI8zM8

Key	MD5 Fingerprint
ECDSA	11:9f:ff:24:a5:e1:fc:7a:a6:ee:46:ec:d6:bd:7a:e3
ED25519	18:b5:de:b0:93:d1:9f:b8:b2:06:44:83:bb:5b:64:dc
RSA	fe:73:d6:67:e3:93:d7:09:54:a5:2e:0d:25:bf:49:48

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