Ask HN: Looking for an interactive way to improve Linux debugging skills

I'm currently working on getting better in linux debugging [0][1]. Are there any challenges like high loaded VMs or something else to play with? Would appreciate something like Hack the box.

[0] https://netflixtechblog.com/linux-performance-analysis-in-60-000-milliseconds-accc10403c55

[1] https://github.com/iovisor/bcc/blob/master/docs/tutorial.md