Accessing Clark

The UMBC operates an SGI Altix 3700 BX2 system known as clark, named after William Clark of the Corp of Discovery Expedition. The fully qualified registered name for clark is

clark.rnet.missouri.edu

In order to log in to clark, you must use a client that supports the SSH version 2 protocol. Telnet access is not allowed. Windows users can download the SSH Secure Shell program from this site. SecureCRT and PuTTY are examples of other Windows programs that support the SSH version 2 protocol. If you use a Unix workstation, you will need to install/upgrade to SSH version 2 if you have not already done so.

The following restrictions are in effect when accessing clark:

Telnet access is not allowed. You must use an SSH version 2 client.
Access via rsh, rlogin, and rexec are not allowed.
FTP connections from remote systems into clark are not allowed. Remote file transfer connections must be initiated using a secure FTP (SFTP) client program that authenticates to the server using SSH version 2. Unix systems with SSH version 2 installed can execute the sftp program. The SSH Secure Shell program for Windows available from this site also supports SFTP.
There is no anonymous FTP on clark.

The operating system on clark is SuSE Linux Enterprise Server 9, with SGI ProPack 4. Linux and other SGI manuals are available online here.

You must submit long-running jobs to the PBS batch queuing system. The PBS scheduler will automatically execute the jobs, based upon availability of resources and system load. For information about how to submit jobs to PBS, see Submitting Jobs via PBS.

Please be aware that the clark system "evolves" as needed to accomodate workload demands. Configurations, options, and restrictions may change as additional software is installed and usage increases. Further documentation on clark usage policies and procedures will be developed as required.