Deprecated: please see new documentation site.

What computing resources are available to LONI users?

At the moment, LONI users can log into the IBM POWER5 clusters located at the following LONI institutions:

  • Bluedawg at Louisiana Tech (
  • Ducky at Tulane (
  • Zeke at ULL (
  • Neptune UNO (

An additional POWER5 cluster is housed at Southern University, and will be made available for use soon.

LONI has also acquired 6 Dell Intel Linux clusters each capable of roughly 5 trillion calculations per second (5 teraflops). The following four clusters are in production and open to LONI users while the other two clusters are being installed at LaTech and Southern (environmental issues) and will hopefully be available for use by late-2008.

  • Eric at LSU (
  • Oliver at ULL (
  • Louie at Tulane (
  • Poseidon at UNO (

Finally, LONI has ordered a large Intel Linux cluster rated at 50 teraflops of theoretical capacity. This central piece is named Queen Be and is housed at the State of Louisiana's Information Services Building (ISB) in downtown Baton Rouge. Half of Queen Bee's computational cycles is contributed to the TeraGrid community as LONI joins TeraGrid. Queen Bee is open for general use to TeraGrid and LONI users.

  • Queen Bee at ISB (

Where can I find information on using the LONI systems?

See the LONI User's Guide for information on connecting to and using the LONI clusters.

Who is eligible for a LONI account?

All faculty and research staff at a LONI Member Institution, as well as students pursuing sponsored research activities at these facilities, are eligible for a LONI account. Requests for accounts by research associates not affiliated with a LONI Member Institution will be handled on a case by case basis. For prospective LONI Users from a non-LONI Member Institution, you are required to have a faculty or research staff in one of LONI Member Institutions as your Collaborator to sponsor you a LONI account.

How can one apply for an account?

Individuals interested in applying for a LONI account should visit this page to begin the account request process. A valid, active email address is required

Who can sponsor a LONI account or request allocations?

LONI provides Louisiana researchers with an advanced optical network and powerful distributed supercomputer resources. The LONI Allocations committee and LONI management require that the Principle Investigators using LONI resources be restricted to full-time faculty or research staff members located at LONI member institutions.

LONI welcomes members of other institutions that are collaborating with Louisiana researchers to use LONI resources, but they cannot be the Principle Investigator requesting allocations or granting access. For the Principle Investigator role, Adjunct and Visiting professors do not qualify. They must ask a collaborating full-time professor or research staff member located at a LONI institution to sponsor them and any additional researchers.

How do LONI users change their passwords?

Once logged into the interactive node of a LONI cluster, user should enter the command loni_passwd.

This command works similarly to the standard Unix passwd command: the user is prompted for their current password and, following confirmation of it, prompted twice for the new password. Successful completion of the command changes the user's password attribute in the LONI directory.

How do LONI users change their login shell?

Once logged into the interactive node of a LONI cluster, users should enter the command loni_chsh.

loni_chsh is modeled after the AIX chsh command. When run with no arguments, a list of available shells is displayed to the user and they are prompted first for their choice of shell and then for their LONI directory password. Following confirmation of the password, their loginShell attribute in the LONI directory is updated to the selected shell.

The command also takes two optional arguments: -l (list shells) and -s (set shell). When run with the -l flag, the list of available shells is displayed and the command returns immediately. The -s flag must be followed by the name of a valid shell. When run with this flag, the user is immediately prompted for their password and the loginShell attribute is set to the value that was submitted on the command line.

How can users communicate with the LONI systems staff?

Questions for the LONI systems' administrators should be directed to

Users may direct questions to

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