I have seen this one other time when the company was using a "corporate custom build" of RHEL as their base instead of real minimal install.
In the end we discovered that the build they were using had the umask changed to 0022. They changed it to 0027 on a fresh install and the ./fullinstall went flawlessly.
We are still looking into this, as it is still not working after changing the umask to 0027. I found that it is not a "vanilla" install of RH6 and that some "Security Configurations" where made before giving me access to install Nagios.
ecarrasq wrote:I found that it is not a "vanilla" install of RH6 and that some "Security Configurations" where made before giving me access to install Nagios.
This is almost surely the problem, once you know what was changed, you will likely know what needs to be corrected.
I triple checked this myself on a RH6 VM I had built out a while back and it worked fine, but with the standard umask 0022. I had the Linux Server Admin try it again with the umask 0022 on a "vanilla" version of RH6 and it worked flawlessly.