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+# links and ideas
+
+* [history of command line arguments](https://blog.liw.fi/posts/2022/05/07/unix-cli/)
+* [systemd-sysext](https://0pointer.net/blog/testing-my-system-code-in-usr-without-modifying-usr.html)
+* do a mini class on barshrc customisation, prompts, zsh and ohmyzsh
+* class on dpkg, apt, and .deb introspection
+* class on compiling a simple program, maybe recompiling a kernel
+* exercise on how to take a physical system and convert it to a VM
+* munin plugin design exercise