Red Hat released RHEL 5.5. More new hardware is supported, of course, and improvements for Virtualization and Interoperability have been incorporated. That really says nothing, so check details in the Release Notes and Technical Notes.
Just found a great tip to prevent timeouts of PuTTY sessions. I'm fine with timeouts by the host, but in our case the firewall kills sessions after 30 minutes of inactivity... When using PuTTY to ssh to your Linux/Unix servers, be sure to use the feature to send NULL packets to prevent a timeout. I've set it to once every 900 seconds, i.e. 15 minutes... See screenshot on the right.
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