NOTE: You must be on the UB or Roswell Park networks to connect to CCR servers.  If you are off-campus, please use the UB VPN to connect

 

Access to most CCR servers is only available through SSH.  Command line terminal access is provided via the SSH protocol, while command line file transfer is available with sftp (Secure File Transfer Protocol) and scp (Secure Copy).  The ssh, scp and sftp client software should be available on all Linux distributions as part of the operating system installation.  There are additional software products available that provide secure drag and drop interfaces for file transfer such as FileZilla.


What is SSH?

Using password-less SSH keys to connect to CCR

 

Connection information

 

hostname:

rush.ccr.buffalo.edu (academic cluster)

presto.ccr.buffalo.edu (industry cluster)

transfer.ccr.buffalo.edu (for uploading/downloading data to/from CCR filesystems only) - requires SSH keys to connect (see here for more details)

 

username:

UB username

 

port:

22

 


Do you have two-factor auth enabled?

If so, you will need to enter your password plus your one-time token (OTP) generated from your mobile app.  They are entered back to back with no spaces.  For example:
If your password is:  BuffaloLove!
And the OTP code generated is:  346 798
When you login to any CCR server or web portal you would enter:  BuffaloLove!346798


More details on two-factor authentication



Command line SSH connection:

 

Using the terminal program on your computer, simply type the following to connect to a CCR server:

ssh YourUBusername@<hostname>


If using SSH keys:

ssh -A YourUBusername@<hostname>



For example, if your UB username is janedoe, to connect to the academic cluster (rush), type the following:

ssh janedoe@rush.ccr.buffalo.edu


If using SSH keys:

ssh -A janedoe@rush.ccr.buffalo.edu

 

 

Displaying Graphics:

 

Connecting to a server via the command line does not allow for any graphical displays.  If you need to display graphics or GUIs while connected to a CCR server, you must use X11 forwarding.  Add the -X to your ssh command, for example:

 

ssh -X janedoe@rush.ccr.buffalo.edu


Additional information about displaying graphics can be found in this knowledge base article


 


Options for File Transfer


Command line file transfer
(NOTE: you may need to specify your username if it is different on your machine than your CCR username.  See above)

This command is run from your machine.  Don't connect to the CCR servers first.


 

scp filename rush.ccr.buffalo.edu:filename

sftp rush.ccr.buffalo.edu

    put filename (Use to upload a file.)

    get file (Use to download a file.)


Drag and drop file transfer software products

Use FileZilla on most Linux distributions (Be sure to specify port 22 when setting up your connection)

  



For users with a large amount of data to transfer:  please use the data transfer server is:  transfer.ccr.buffalo.edu

Use either the command line or drag/drop software options above to transfer your files.  Using this server requires the use of SSH keys.  Please see this knowledgebase article for more details


NOTE: The data transfer server is not to be used for compiling code or submitting jobs to the cluster.  If you have modules sourced in your login files, you will get an error message when you login as modules are not supported on the data transfer server.