Depending on what you need, you may need several programs for it under linux. As far as gui goes, i do not know an exact analogue. For the command line, if you need system component information, you can use hwinfo or inxi. If you need temperatures, sensors is your friend.
There is a gui program psensors. Also, if you need cpu-z, an almost exact analogue is cpu-x, but it is not in the repos (appimage is available).