Texas Tech University

Connecting to HPCC Systems

The HPCC currently operates two Linux clusters, Quanah and Hrothgar. Instructions for how to connect to our Linux clusters depends on the operating system you are current using and whether you are attempting to log in from within the TTU network or from outside the network. Instructions for each of these dependencies can be found below.

Table of Contents:

  1. Logging in to the Linux Clusters using Windows
    1. Getting an SSH client
    2. Connecting to HPCC Resources via SSH on Windows
  2. Logging in to the Linux Clusters using Linux/Mac
    1. Connecting from "On Campus" using Linux/Mac
    2. Connecting from "Off Campus" using Linux/Mac

Logging in to the Linux Clusters using Windows

If you are connecting to the Linux clusters from the wired TTU network or the TTUnet wireless network, then you are considered to be "on campus". Connections made from TTUHSC, the TTUguess wireless network or any other off campus site is treated as an "off campus" connection.

Getting an SSH client

Windows, by default, does not come with an SSH client that would allow you to connect to HPCC systems. Thus, the first step of connecting to HPCC systems for Windows users is to obtain an SSH client. The HPCC suggests that Windows users use one of the following SSH clients:

  • Bash on Ubuntu on Windows - Available on Windows 10 only
  • Bitvise SSH Client - Available for all versions of Windows
    • Bitvise is a heavier SSH client with built in graphical SFTP and a cleaner interface.
    • Bitvise can be downloaded (for free) from the Bitvise Website.
  • PuTTY - Available for all version of Windows
    • PuTTY is a lightweight SSH client developed by Simon Tatham.
    • PuTTY can be downloaded (for free) from the PuTTY Website.

Connecting to HPCC Resources via SSH on Windows

For ease of readability, we have branched the SSH instructions for Windows. To connect to HPCC resources using SSH on Windows, please select which method you are using:


Logging in to the Linux Clusters using Linux/Mac

If you are connecting to the Linux clusters from the wired TTU network or the TTUnet wireless network, then you are considered to be "on campus". Connections made from TTUHSC, the TTUguess wireless network or any other off campus site is treated as an "off campus" connection.

Connecting from "On Campus" using Linux/Mac

Open a new console/terminal and type in the following:

#Connecting to Quanah
ssh <eraider>@quanah.hpcc.ttu.edu
#Connecting to Hrothgar
ssh <eraider>@hrothgar.hpcc.ttu.edu

You will be prompted for your eraider password and once you have entered it you will be logged into Quanah or Hrothgar where you can begin submitting jobs.

Connecting from "Off Campus" using Linux/Mac

All external traffic to the HPCC servers must first flow through the SSH gateway. So you will first need to connect to the SSH gateway and then connect to Quanah or Hrothgar from there. To do this you will need to first open a new console/terminal and type in the following:

#Connect to the TTU SSH Gateway
ssh <eraider>@ssh.ttu.edu

You will be prompted for your eraider password, type it in then press enter. Once you have successfully entered your eraider password, the system will respond back with:

You are now connected to the TTUnet SSH Gateway. 
Please specify the following information to continue
connecting via SSH to a device on the network.
This connection will automatically timeout in 24 hours
Hostname or IP Address of SSH instance:
#Enter either quanah.hpcc.ttu.edu or hrothgar.hpcc.ttu.edu
User account to connect with:
#Enter your eraider username

You will be prompted for your eraider password and once you have entered it you will be logged into Quanah or Hrothgar where you can begin submitting jobs.

 

High Performance Computing Center