Foreword to the second edition
As soon as the stable Nagios version 3.0 appeared, as can be expected after going to press, the question was raised: Nagios 2 or Nagios 3? For those just starting out with Nagios, Nagios 3.0 is a safe bet. Even the release candidate 3.0rc1 was sufficiently stable for production environments, and you can benefit directly from the new features, rather than having to get used to them later on.
If you are already using Nagios 2 in a sizable environment, then you'll surely be thinking, Never touch a running system. Why change if your existing system is running smoothly? But there has been further development on Nagios 2 since the first edition of this book appeared, and various bugs have been fixed.[1] So it is perhaps ...
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