Looks like he used Ardour [1] and Guitarix [2].
I am curious about the latency of this setup, having used jack and Ardour in the past for recording. I would be very surprised if this rig yields a latency below a couple dozen milliseconds, which, at least for me, is absolutely unbearable when playing guitar.
Even with a dedicated DSP, effects processors in the early 2000's (like the otherwise excellent Vox TonelabSE) greatly struggled with latency issues.