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For linux, be sure to use 1.6.5.2 or greater.
If you need to build your own OpenAFS RPMs from the OpenAFS git source tree, see this page.
The OpenAFS download directories can function as a YUM repository if you create a yum repo config file pointing to the OpenAFS website. Attached is a sample repo yum repository config for OpenAFS 1.6.5 running on RHEL6 and a sample yum repository config for OpenAFS 1.6.5 running on Fedora. If these do not work, make sure that binaries have been published on the OpenAFS.org web site. If not, CNF may be able to supply you with pre-compiled binary RPMs. You will want to install the following RPMs:
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