Plotting from a server

[HugoTrentesaux]

@ericphanson

I see you’re using Plots.jl, and “GKS” sounds like the GR backend. In that case, set the magic environmental variable

ENV["GKSwstype"] = "100"

which tells it to operate in “headless” mode where it doesn’t expect an active display connected. (AFAIK this is undocumented but it’s super useful!).

Hum. This definitely should be documented.