Longtime system administrators often take tools for granted that they’ve used for years and assume everyone else has heard of them. Of course, new sysadmins join the field every day, and even seasoned sysadmins don’t all use the same tools. With that in mind, I decided to write a few columns where I highlight some common-but-easy-to-overlook tools that make life as a sysadmin (and really, any Linux user) easier. My last article covered sar, a tool you can use to collect and view system metrics over time.