10. Note the escape character! Why is that necessary?

13. Don’t worry, we’ll come back to the interesting stuff in this example …

17. * More on the PATH environment variable later

19. less is more, folks

28. find found four files with filenames, finally!

31. What is the difference between the second and the third commands?

47. What did I forget to do in line 2?Did I finish this script?

48. Lots of variables!

51. Everyone remember this? We’re all safe now, but even shells contract vulnerabilities!

52. iTerm2 -- https://www.iterm2.com/https://www.iterm2.com/

55. Sublime Text -- https://www.sublimetext.com/https://www.sublimetext.com/