Unix for Advanced Users

Where is whereis?

If it is not in your path, finding whereis without using whereis may seem like a Catch 22. In fact, this feat can be accomplished either with a trail-and-error, manual search of directories or with find. Since either method takes some time, it is helpful to learn the answer in advance:

Linux/usr/bin/Solaris/usr/ucb/SunOS/usr/ucb/Irix/usr/bsd/HP-UX/usr/bin/Digital UNIX/usr/bin/
Operating systemLocation