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The LinCompute Cluster provides UT Austin students, faculty, and staff access to a set of Linux remote servers and software. Permission does not need to be granted to access the server; anyone with an active UT EID will be able to connect.

The LinCompute Cluster consists of three nodes; two compute nodes and a front-end node. You can connect to any of these nodes, depending on your needs. The node addresses are:

Note that the LinCompute Cluster shares the same user profile disk space as the WinCompute cluster. This makes sharing files between LinCompute and WinCompute easy. Note that there is a default quota of 20GB per user.

Prerequisites

  • You must have a computer with an internet or campus network connection

  • You must have either a ssh client, or a web browser

Software Included

Guidelines for using the LinCompute Cluster

  • Do not store critical files on your LinCompute Cluster profile, as they may not be saved long-term and are not backed up or archived.  You can download files from UT Box, an e-mail account, or other sources to access on the server.

  • The LinCompute Cluster does not meet the requirements for storing Category-I (Confidential) data.  Do not store Category-I data on your profile on the cluster.

  • It is a shared resource; please be aware of how your use may impact others. Limit the amount of CPU and RAM you use when possible.

  • The LinCompute Cluster is intended for short-duration personal projects or for trying out a new software package prior to purchasing or running elsewhere (e.g. TACC).  We do not recommend using the LinCompute Cluster for work related to dissertations, theses, publications, or time-sensitive projects. We cannot guarantee that the performance of the LinCompute Cluster at any given time due to its shared nature.

Getting Connected via SSH

Mac

  1. Go to Applications > Utilities, and then open Terminal.

  2. Establish an SSH connection to the server by using any one of the following commands, where “your-eid” is replaced by your actual UT EID username.

    1. ssh -X your-eid@lincompute.cns.utexas.edu
ssh -X your-eid@cns-srv-lnode2.austin.utexas.edu
ssh -X your-eid@linuxcompute.cns.utexas.edu

  3. The first time that you connect to one of the servers, a message will ask you if you want to continue connecting. This message appears because the remote server has an RSA key that's not stored in your system registry and as a result, the identity of the key can't be verified. This is normal for your very first connection, and should not appear when you later connect to the same machine. If this happens, simply type yes and press Enter. This action will add the RSA key to the list of known hosts on your machine so that you don't see this warning again when you make future connections from the same machine. You can expect to see that warning again, however, if you connect from a
    different computer.

  4. You will be prompted for your password. Enter your UT EID password and press Enter. Note that the password does not echo to the screen as you enter it.

  5. You're done! You should now be connected to the desired LinCompute node (either Linuxcompute.cns.utexas.edu or cns-srv-lnode2.austin.utexas.edu (aka cns-srv-lnode2.cns.utexas.edu).

Windows

To connect from Windows, you will need to install an ssh client in Windows. We recommend using a client called PuTTY for this purpose.

  1. If you do not already have a ssh client such as putty installed, then download PuTTY from the PuTTY website. Ensure that you comply with the license requirements. If you need assistance installing PuTTY on your machine, contact the CNS Help Desk at https://cns.utexas.edu/help or help@cns.utexas.edu.

  2. Launch the PuTTY application.

  3. Use the following steps to configure your connection:

    1. In the PuTTY Configuration window, enter the following values:

    2. Click Open.

    3. The first time that you connect to one of the servers, a message will ask you if you want to continue connecting. This message appears because the remote server has an RSA key that's not stored in your system registry and as a result, the identity of the key can't be verified. This is normal for your very first connection, and should not appear when you later connect to the same machine. If this happens, simply type yes and press Enter. This action will add the RSA key to the list of known hosts on your machine so that you don't see this warning again when you make future connections from the same machine. You can expect to see that warning again, however, if you connect from a
      different computer.

  4. You will be prompted for your username and password. User your UT EID username, and your UT EID password. The password at is not echoed to the screen. Then, press Enter.

    If you have entered the correct username and password, it will log you in and respond with
    a shell prompt.

  5. You're done! You should now be connected to the desired LinCompute node (either Linuxcompute.cns.utexas.edu or cns-srv-lnode2.austin.utexas.edu (aka cns-srv-lnode2.cns.utexas.edu).

Linux

  1. Open a terminal window.

  2. Establish an SSH connection to the server by using any one of the following commands, where “your-eid” is replaced by your actual UT EID username.

    1. ssh -X your-eid@lincompute.cns.utexas.edu
ssh -X your-eid@cns-srv-lnode2.austin.utexas.edu
ssh -X your-eid@linuxcompute.cns.utexas.edu

  3. The first time that you connect to one of the servers, a message will ask you if you want to continue connecting. This message appears because the remote server has an RSA key that's not stored in your profile and as a result, the identity of the key can't be verified. This is normal for your very first connection, and should not appear when you later connect to the same machine. If this happens, simply type yes and press Enter. This action will add the RSA key to the list of known hosts on your machine so that you don't see this warning again when you make future connections from the same machine. You can expect to see that warning again, however, if you connect from a
    different computer.

  4. You will be prompted for your password. Enter your UT EID password and press Enter. Note that the password does not echo to the screen as you enter it.

  5. You're done! You should now be connected to the desired LinCompute node (either Linuxcompute.cns.utexas.edu or cns-srv-lnode2.austin.utexas.edu (aka cns-srv-lnode2.cns.utexas.edu).

Getting Connected via the Web

You can connect to a web interface via any normal web browser. Currently only R Studio is available via the web interface, but we hope to add Jupyterhub notebook soon.

Note: From the R Studio web interface you can get a Linux command line shell and execute command similar to if you used ssh to login (though without any X11 forwarding for graphic applications).

To connect via the web, you must connect to https://lincompute.cns.utexas.edu/ and not to a back-end machine. It will load balance your connection to one of the back-end nodes automatically.

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