So I have an ethernet cable but I can see only one end of it. From the colors this end is Straight. The other end is connected to a router or switch (I don't know where it's connected because it goes inside a wall).
Is there a way to know if it's Crossover or not?
Problem is, it works on a laptop with Windows 10. Doesn't work on the same laptop with Ubuntu (Linux 3.2), doesn't work on a mac and doesn't work on a router (a Linksys). By doesn't work I mean it's not even recognised as plugged. I need to make it work on a router I have (the router's ports are all working, I tested with another cable).