ntpd (from ntp.org) has recently gotten a bad rap. A series of vulnerabilities have been found in it that, from my perspective, make it no longer safe to run on production, publicly facing machines; however, there is an alternative: openntpd.
CVE-2014-0160 which recently made headlines because of it's massive impact across the large majority of Internet-based services has allowed us to show that the return on investment with puppet is greater than 0. Here's how.
Recently my server ran out of space, but my checks (via du) reported that only about 60GB was actually being used. That's because if a process has a file open that is then deleted, the space is still claimed, but the file doesn't appear.