xinput is a commandline tool to change X device properties. Specifically, it's a generic interface to change X input driver configuration at run-time, used primarily in the absence of a desktop environment or just for testing things. But there's a feature of xinput that many don't appear to know: it resolves device and property names correctly. So plenty of times you see advice to run a command like this:
xinput set-prop 15 281 1This is bad advice, it's almost impossible to figure out what this is supposed to do, it depends on the device ID never changing (spoiler: it will) and the property number never changing (spoiler: it will). Worst case, you may suddenly end up setting a different property on a different device and you won't even notice. Instead, just use the built-in name resolution features of xinput:
xinput set-prop "SynPS/2 Synaptics TouchPad" "libinput Tapping Enabled" 1This command will work regardless of the device ID for the touchpad and regardless of the property number. Plus it's self-documenting. This has been possible for many many years, so please stop using the number-only approach.