Welcome to redhawk.ccur.com

This site provides you access to Concurrent software products and updates to Concurrent products that execute on the following platforms:

  • RedHawk Linux
  • Red Hat Linux
  • Fedora
  • Ubuntu
  • Debian
You can download NUU, Concurrent's Network Update and Installation utility, browse product RPM repositories to manually download software packages, or create customized Update CD images for immediate download.

There is one alert at this time.

Leap Second Alert

On December 31, 2016 there will be a leap second added at midnight to the Coordinated Universal Time (UTC). In the past when a leap second was added some versions of Linux had issues with NTP not adjusting the system time accordingly. With that in mind, no matter what version of RedHawk that you are running it is recommended that you update the ntp, ntpdate and tzdata rpms either through RHEL or CentOS repositories. See below for customers using the ccur-ntp rpm.

For customers running RedHawk 5.4 you are strongly advised to download and install the latest 5.4.20 update as this contains a kernel fix that was uncovered after the last leap second was added. Those customers that have an RCIM with a GPS to control the time on their system are using the ccur-ntp rpm. If you do have this configuration it is advised to update to the latest kernel update for your version of RedHawk. There is no update needed for the ccur-ntp rpm.

Further details about NTP and leap seconds can be found at this link:


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Concurrent Documentation Library

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 Computer Corporation web site at http://real-time.ccur.com/support or by sending an email to support@ccur.com.