Are there any tools that would help detect/locate cabling issues?
I suspect I have a dodgy connection on a length of cable that runs outside my house between my (Ubuntu) desktop and my (OpenWrt) router. There's a gigabit switch between the two although I could probably reroute cables enough to bypass that if necessary.
My old desktop has been generally slow for a while, and now that I've replaced it with a new PC, with a fresh install to a new SSD, it's (very disappointingly) no better. Given that most of what I use it for uses the network in some way I'm thinking that's my next place to look.
Mark