Introduction to systemd.

Different ways to visualize device utilization across multiple devices, and how that utilization is changing over time.

Getting familiar with common uses of lsof

I needed to list all files in a directory, but ls, find, and os.listdir all hung. This is my story. TLDR: Write a C program that calls the syscall getdents directly, with a large buffer size, ignore entries with inode == 0.