A tricky challenge with a health check script who’s solution can be found in rules that aren’t so healthy.

One of those challenges where you need to close a pesky file that a process keeps opening.

Notes from running through the Bilbao scenario from SadServers. Where you fix basic Kubernetes problems.

Write up for the Taipei challenge. A scenario that goes through how to port knock on a firewall.

Write up for the Bata: Find in /proc. Where you need to find a file that contains the string ‘secret’.