CITES | University of Illinois

Service Level Definition: COSMOS (CITES Open Source Mirror of Operating Systems)

This page contains the service level definition (SLD) for COSMOS (CITES Open Source Mirror of Operating Systems).



COSMOS provides a local source for installation software, updates, and security patches for the more prevalent open source operating systems, primarily the most popular Linux distributions.

Who can use this service

The primary audience is campus system and network administrators who run departmental servers and computers. The service is also available to faculty, staff, and students who manage their personal or office computers.

When the service is available for use

Supported Service Hours:
9:00 A.M. to 5:00 P.M. Monday through Friday

Extended Service Hours:
5:00 P.M. to 5:30 A.M. Monday through Friday
Weekends (excluding the Maintenance Hours listed below)

Maintenance Hours:
5:30 A.M. to 7:30 A.M. Monday through Friday
5:30 A.M. to 10:00 A.M. Saturday
5:30 A.M. to 12:00 P.M. Sunday

No-Service Hours:
5:30 A.M. to 7:30 A.M. third Monday of every month

What you must have in order to use the service

  • Computer with network connection
  • Network client software such as FTP, HTTP, rsync, etc. (In most cases, the software is already installed on the computer.)

Where to go for help

If you are having difficulty with the COSMOS web page, please email for assistance. The COSMOS service is intended to be a convenient campus source to obtain certain open source operating systems, but offers only limited support of the operating systems themselves. Questions that directly pertain to installing or running an operating system are best answered by referring to the operating system's web page, which is listed on the COSMOS web page.

Additionally, you can arrange a contract with the CITES Workstation Services Group to install and maintain the operating system on your computer. See Contract Services for more information.

Dependencies on other services


A subsidy provided by the Provost on behalf of the campus allows CITES to offer this service at no charge.

How to request changes to this service


How to find out about changes to this service

Major changes will be announced on the CITES Status web page and posted to the CITES-TECHSUPPORT mailing list.

Date created

June 23, 2005

Date of last review

July 28, 2009

Last updated Sunday, March 4, 2012, 11:59 pm