Earlier, we showed you how to unlock the bootloader. In this episode, XDA Developer TV Producer Steve shows you how to install ClockWorkMod Recovery on the HTC One and then gain root access. This allows you to use a lot of awesome root applications. Check out this video.
Be sure to check out other great XDA Developer TV Videos.
via How to Root the HTC One (M7) and Install Recovery – XDA Developer TV – xda-developers.