Product Repositories

Concurrent Real-Time provides software repositories for all of its standard products. hosts YUM repositories (rpm packages) as well as Debian-style APT repositories (deb packages) for RedHawk systems running either CentOS/RHEL or Ubuntu, respectively.

Both the YUM repositories (rpms) and the APT repositories (debs) are compatible with their respective standard client access methods. Since the access methods differ significantly, their descriptions are split into two difference sections:

Repository Content - Browsing

In addition to individual rpm and deb packages, many of the modern repositories contain the original product Installation Disc ISO9660 images.

Installation disc images for CentOS and Ubuntu are included as well.

You can browse through the repositories to locate the installation disc images and then download them.

Browse Repositories

Secure Sites

For customers that do not have access to Concurrent Real-Time's network from their secured systems, a browser can be used outside of your secured area to navigate repositories and download software for subsequent transport to secured areas.

Original product installation discs (ISO9660 images) or packages (rpms or debs) can be downloaded manually. In addition, customized Update Disc images can be created and downloaded for immediate installation.

Browse Repositories

Update Discs

For customers who prefer physical media or do not have access to Concurrent Real-Time's network from their secured systems, physical discs can be requested by contacting Concurrent Real-Time Software Distribution at

Alternatively, you can create update disc ISO9660 images for your site and immediately download them for installation.

Create Update DVD Images

Repository Keys

Concurrent Real-Time signs selected repositories with a GPG-generated RSA and ElGamal key pair. Some installation techniques require Concurrent Real-Time's public key to be installed on your system so that the authenticity of these repositories can be verified.

You can download the ccur-public-keys file and import the key file as needed into your RPM-based or APT-based client systems. You should import the key file before attempting to access software from Concurrent Real-Time's repositories.

Importing Keys on Ubuntu/Debian

Recent versions of Debian and Ubuntu require that repositories be signed. Therefore, you must import Concurrent Real-Time's public keys, as shown in the commands below:

Importing Keys on CentOS/RHEL

Concurrent Real-Time does not currently sign its rpm-based repositories or RPMs, although that may change in the future. Currently this doesn't prohibit software installation because our repository definitions use the "gpgcheck=0" directive.

Thus, the following is optional at this time:


If you wish to check the authenticity of the public keys you downloaded from Concurrent Real-Time, request the key fingerprints from Concurrent Real-Time Support and compare them to the fingerprints of the keys you downloaded. You can obtain the fingerprints you downloaded with the following command:

gpg --with-fingerprint ccur-public-keys


If you need assistance, please contact the Concurrent Real-Time 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 main site at or by sending an email to