HPRC:Access

UNDER CONSTRUCTION

Access Using SSH

To connect to HPRC clusters, you must use SSH (Secure Shell). SSH is a client-server software that provides for secure (by encryption) logins and other communication between two hosts. SSH is freely available in the Internet for Linux/Unix and PC Windows (in the guise of MobaXterm).

To initiate SSH connection to target cluster's login node, find the hostname and credential (userID/password) info from Table 1 below. For example, connecting to Ada cluster from a terminal or terminal emulator, enter:

localhost$ ssh NetID@ada.tamu.edu

where the ada.tamu.edu address is a DNS round-robin alias for ada[1-8].tamu.edu. You will be prompted for your password in order to establish authentication. Once you login into one of the login nodes, the shell's prompt will be NetID.ada[1-8].

If, however, you are connecting for the very first time, you will see a message similar to the following, before arriving at the password prompt:

The authenticity of host 'ada (165.91.16.18)' can't be established.
ECDSA key fingerprint is SHA256:SfQPtDJW30sj4kG2c4KGFw7LcEduSOFeXGIlsf4WhEA.
ECDSA key fingerprint is MD5:9c:ea:ba:22:0f:6f:1e:b9:0c:21:d4:b6:70:0f:a0:d5.
Are you sure you want to continue connecting (yes/no)? 

Type yes and you will then be presented with the password prompt.

Warning: Permanently added 'ada1' (ECDSA) to the list of known hosts.
NetID@ada.tamu.edu's password:

Table 1: Hostname and credential info of HPRC clusters

Cluster	Hostname	Number of login nodes	Credential (UserID / Password)
Ada	ada.tamu.edu	8 (ada1 ~ ada8)	NetID / NetID password
Eos	eos.tamu.edu	5 (eos1 ~ eos5)	Eos_ID / Eos password
Curie	curie.tamu.edu	2 (curie1 ~ curie2)	NetID / NetID password
Neumann	neumann.tamu.edu	4 (neumann1 ~ neumann4)	NetID / NetID password
Crick	crick.tamu.edu	1 (crick1)	NetID / NetID password

Access from MacOS

Using the Terminal Program

Find the Terminal program, under Applications->Utilities.

On your Mac click the Finder icon to start finder:

1. Select Applications
2. Double click the Utilities folder
3. Double click the Terminal utility
4. A Terminal window will now appear.
5. Connect to the cluster using SSH.

Remote Display of Programs with Graphical Interfaces

The recommended X-Windows emulator for Mac OS X is Apple X11, which is available free from Apple.

1. After X11 is installed on your system, start Apple X11.
2. A xterm window should appear on your screen.
3. Login to a UNIX machine (example: eos.tamu.edu).

   ssh -X yourusername@eos.tamu.edu

   The -X option tells SSH to allow programs to forward and display their graphical interfaces. This is known as X11 forwarding.
4. To verify that X11 forwarding is working, type the following command:

   xterm

   If a new xterm terminal window for the remote system pops up, then X11 forwarding is working correctly.

Access from Linux/Unix

OpenSSH is an SSH v1.x and v2.x compliant SSH package that is available for many Linux and Unix operating systems and is " ...freely usable and re-usable by everyone under a BSD license... ". OpenSSH also includes secure copy (scp), which may be used instead of ftp. It is available from:

ftp://ftp.openssh.com/pub/OpenBSD/OpenSSH/portable/.

Remote Logins

If you are using a UNIX based system (IRIX, Linux, SunOS, etc) you will typically need to type the following command from a shell terminal:

Off-campus Access

For connecting to cluster login nodes from outside the campus, you need to activate Virtual Private Network (VPN) first, then initiate SSH connection to the cluster login nodes. You can find VPN installation instruction from TAMU ServiceNow Knowledge Base page on VPN.