The preferred mechanism for network installation and update on CentOS and RHEL systems is to use NUU, Concurrent Real-Time's Network Update and installation Utility. NUU analyzes the software installed on your system, contacts Concurrent's software repositories via the Internet, and allows you to install and update software.

For Ubuntu-based systems, there is a similar mechanism using standard Ubuntu utilities. See APT Repositories for more information.

For customers who lack network connections to Concurrent's software repositories from their secured systems, web-based browsing is made available. You can locate software updates for your products and download them for subsequent transport to secured systems.

Enter your Login and Password and press the browse button to proceed:



If you do not have a Login and Password or if you need assistance, please contact the Concurrent Software Support Center at our toll free number 1-800-245-6453. For calls outside the continental United States, the number is 1-954-283-1822. The Software Support Center operates Monday through Friday from 8 a.m. to 5 p.m., Eastern Standard Time.

You may also submit a request for assistance at any time by using the Concurrent Real-Time web site at or by sending an email to