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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:nodes but is accessed as if it was a single server. The server name to connect to is lincompute.cns.utexas.edu

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linuxcompute.cns.utexas.edu (older back-end node)

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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.

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

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

   Code Block

   : 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 serversserver, a message will ask you if you want to continue connecting. This message appears because the remote server has an RSA ssh 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 ssh 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)LinCompute cluster.

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:

      • In the Host Name field, enter any one of the names lincompute.cns.utexas.edu, linuxcomputename lincompute.cns.utexas.edu, or cns-srv-lnode2.austin.utexas.edu (aka cns-srv-lnode2.cns.utexas.edu).

      • Ensure that the connection type is set to SSH.

      • (Optional but recommended) In the Saved Sessions field, assign a name for
        this connection (such as LinCompute). Assigning a name saves time the next time that you use Putty.

   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 ssh 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 ssh 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 Note that 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).cluster.

Linux

1. Open a terminal window.

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

   Code Block

   : 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 ssh 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 ssh 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).LinCompute cluster.

Getting Connected via the Web

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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 automaticallyselect the application you want (R Studio for example). The application will ask you to login using your UT EID username and password.