Videos / DevOps

Episode 1 of 14 · DevOps, end to end

The terminal: the shell, and the small number of ideas it runs on

Chapters

1. A program that waits0:00
2. Words, not a sentence0:15
3. How it finds the program0:31
4. Rewritten before it runs0:47
5. The order is fixed1:05
6. A small idea, wrapped around1:25
7. Three numbered channels1:41
8. A descriptor is an index1:59
9. Redirection rewires it2:17
10. Why errors still reach you2:35
11. Duplicating a channel2:51
12. The drain and the split3:09
13. A length of hose3:27
14. Both run at once3:43
15. Text as interface4:00
16. One job each4:18
17. Seven stages4:33
18. Where composition breaks4:49
19. The survival set5:08
20. Grep thinks in lines5:26
21. Sed rewrites a stream5:44
22. Awk sees fields6:02
23. Names first, then work6:19
24. Counting, and then JSON6:38
25. Quotes are a wall6:56
26. The quoting rules7:14
27. A number on exit7:31
28. And and or are the branch7:49
29. Three settings, line one8:07
30. The cleanup that runs8:24
31. A running copy of a file8:42
32. Foreground and background8:58
33. Signals, not calls9:16
34. Nine is the last9:33
35. The hangup on the way out9:52
36. Three when it hangs10:09
37. The whole thing10:27

The terminal: the shell, and the small number of ideas it runs on. That blinking prompt is a program. Not the operating system, and not the window it is drawn in. It is a program called a shell, whose whole job is to read the line you type, work o

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