1 00:00:02,029 --> 00:00:03,340 Now at first sight, 2 00:00:03,340 --> 00:00:06,790 completely not related to what we just talked about, 3 00:00:06,790 --> 00:00:10,890 is the topic of Human Computer Interaction. 4 00:00:10,890 --> 00:00:12,700 Now, what's going on now? 5 00:00:12,700 --> 00:00:14,550 If you're working on a computer, 6 00:00:14,550 --> 00:00:17,060 you interact with that computer, right? 7 00:00:17,060 --> 00:00:19,610 You click here and there, you create folders, 8 00:00:19,610 --> 00:00:22,640 you open applications, and so on. 9 00:00:22,640 --> 00:00:25,560 Now, if you think a bit more about this, well, process, 10 00:00:25,560 --> 00:00:26,920 about this interaction, 11 00:00:26,920 --> 00:00:29,430 then it's a bit more complicated 12 00:00:29,430 --> 00:00:31,513 than what it seems at first sight. 13 00:00:32,400 --> 00:00:35,000 Let's think about this in a very easy way. 14 00:00:35,000 --> 00:00:37,220 You, as the human being are here, 15 00:00:37,220 --> 00:00:40,400 and your computer, the machine, is there. 16 00:00:40,400 --> 00:00:42,530 Now, you work with this computer 17 00:00:42,530 --> 00:00:45,490 and you want this computer to do something. 18 00:00:45,490 --> 00:00:47,620 So, you think, or you say, well, 19 00:00:47,620 --> 00:00:50,360 open the applications folder for example, 20 00:00:50,360 --> 00:00:52,340 here on the MacBook. 21 00:00:52,340 --> 00:00:53,640 Well, then you do this probably 22 00:00:53,640 --> 00:00:55,910 by navigating to the applications folder 23 00:00:55,910 --> 00:00:57,650 and by double-clicking it. 24 00:00:57,650 --> 00:01:02,280 But, the logic that this navigation for the folder structure 25 00:01:02,280 --> 00:01:04,599 and this double-click and so on works, 26 00:01:04,599 --> 00:01:07,990 but this is actually due to, well, the way 27 00:01:07,990 --> 00:01:11,860 Human Computer Interaction is designed by developers. 28 00:01:11,860 --> 00:01:14,680 Because by default, well, talking to the computer, well, 29 00:01:14,680 --> 00:01:16,210 would result in nothing. 30 00:01:16,210 --> 00:01:20,170 We need to have kind of an interaction, an interface, 31 00:01:20,170 --> 00:01:22,810 that makes sure that we as human beings 32 00:01:22,810 --> 00:01:25,080 and the computer, as a machine, well, 33 00:01:25,080 --> 00:01:27,033 can interact with each other. 34 00:01:28,050 --> 00:01:31,790 This can be done in two different ways. 35 00:01:31,790 --> 00:01:34,173 It can be done via a so-called GUI 36 00:01:35,110 --> 00:01:36,107 or a CLI. 37 00:01:37,040 --> 00:01:38,826 Now, what are these, now? 38 00:01:38,826 --> 00:01:39,700 GUI 39 00:01:39,700 --> 00:01:43,500 stands for Graphical User Interface. 40 00:01:43,500 --> 00:01:45,170 Whereas, CLI 41 00:01:45,170 --> 00:01:47,933 stands for Command Line Interface. 42 00:01:48,800 --> 00:01:50,780 This doesn't help a lot, I guess. 43 00:01:50,780 --> 00:01:54,470 But, if we look at an example GUI, well, 44 00:01:54,470 --> 00:01:57,970 you might feel quite familiar with it, right? 45 00:01:57,970 --> 00:02:01,360 This is the finder here on my Mac computer, 46 00:02:01,360 --> 00:02:04,270 which would be the equivalent to the Windows Explorer, 47 00:02:04,270 --> 00:02:07,610 in case you're working on a Windows machine at the moment. 48 00:02:07,610 --> 00:02:10,100 Both of these, well, interfaces, 49 00:02:10,100 --> 00:02:13,530 so to say, are Graphical User Interfaces. 50 00:02:13,530 --> 00:02:17,820 So, these are in the end, interfaces made by developers 51 00:02:17,820 --> 00:02:20,410 to make sure you as human being, 52 00:02:20,410 --> 00:02:24,000 can easily access your machine, the different folders, 53 00:02:24,000 --> 00:02:25,963 the different programs and so on. 54 00:02:26,870 --> 00:02:30,700 Now, turns out that this GUI was just created to make this 55 00:02:30,700 --> 00:02:34,570 interaction between humans and machines as easy as possible. 56 00:02:34,570 --> 00:02:37,070 Because if you don't want to become a web developer, 57 00:02:37,070 --> 00:02:40,150 or if you're not that into computers at all, well, 58 00:02:40,150 --> 00:02:43,050 then this is actually a very convenient way 59 00:02:43,050 --> 00:02:44,803 to interact with a computer. 60 00:02:45,690 --> 00:02:49,323 We could actually also use a CLI, though. 61 00:02:49,323 --> 00:02:51,520 A CLI would look like this. 62 00:02:51,520 --> 00:02:55,950 This is the same folder structure displayed, now there. 63 00:02:55,950 --> 00:02:59,330 In contrast to the GUI, our finder here, 64 00:02:59,330 --> 00:03:03,160 this CLI is the so-called Terminal on the Mac 65 00:03:03,160 --> 00:03:04,620 or the Command Prompt, 66 00:03:04,620 --> 00:03:07,480 which will be the equivalent on the Windows machine. 67 00:03:07,480 --> 00:03:10,810 This is command-based computer interaction. 68 00:03:10,810 --> 00:03:13,580 Meaning, I just navigated into this folder 69 00:03:13,580 --> 00:03:15,580 by typing certain commands. 70 00:03:15,580 --> 00:03:17,100 I didn't use a mouse. 71 00:03:17,100 --> 00:03:19,400 I didn't use any kind of click or double-click. 72 00:03:19,400 --> 00:03:23,223 I just navigated by a pure command input. 73 00:03:24,410 --> 00:03:27,640 And the question now is why am I telling you this? 74 00:03:27,640 --> 00:03:30,078 Why is this important for this module? 75 00:03:30,078 --> 00:03:34,210 Well, because, turns out that the fastest 76 00:03:34,210 --> 00:03:37,210 and most common way to efficiently work with Git and GitHub, 77 00:03:38,240 --> 00:03:41,380 is the Command Line Interface. 78 00:03:41,380 --> 00:03:45,170 There are options to use a Graphical User Interface 79 00:03:45,170 --> 00:03:47,030 when working with these tools, 80 00:03:47,030 --> 00:03:50,450 but once you're familiar with the CLI-based, well, 81 00:03:50,450 --> 00:03:53,050 computer interaction with Git and GitHub, 82 00:03:53,050 --> 00:03:56,660 this is the preferred approach of most developers 83 00:03:56,660 --> 00:04:00,640 and also the approach we will teach you in this module. 84 00:04:00,640 --> 00:04:01,850 So, this is the reason 85 00:04:01,850 --> 00:04:05,950 why we need to understand the CLI approach here. 86 00:04:05,950 --> 00:04:09,900 And specifically, if you're using a Mac computer, 87 00:04:09,900 --> 00:04:13,460 we will use the Terminal there, the so-called z Shell. 88 00:04:13,460 --> 00:04:14,390 Which is basically 89 00:04:14,390 --> 00:04:17,500 the software running the Terminal so to say. 90 00:04:17,500 --> 00:04:21,533 The Terminal is the Command Line Interface of Mac computers. 91 00:04:21,533 --> 00:04:23,160 And for Windows users, 92 00:04:23,160 --> 00:04:26,360 we will work with the Command Prompt, the CMD. 93 00:04:26,360 --> 00:04:29,210 An alternative would be the so-called PowerShell. 94 00:04:29,210 --> 00:04:32,263 This is a newer version to interact 95 00:04:32,263 --> 00:04:35,980 from the command line with Windows computers. 96 00:04:35,980 --> 00:04:38,830 We'll focus onto the Command Prompt though, 97 00:04:38,830 --> 00:04:40,690 as it is the more established 98 00:04:40,690 --> 00:04:43,310 and also still more common way 99 00:04:43,310 --> 00:04:46,393 to interact with Windows machines via the Command Line. 100 00:04:47,260 --> 00:04:51,000 So, the takeaway here is if this is not new to you, 101 00:04:51,000 --> 00:04:53,610 then you can skip the next two lectures. 102 00:04:53,610 --> 00:04:56,090 If you never heard of these concepts, 103 00:04:56,090 --> 00:04:57,890 or if you're not familiar with these, 104 00:04:57,890 --> 00:04:59,530 then if you're a Mac user, 105 00:04:59,530 --> 00:05:01,970 please continue with the next lecture. 106 00:05:01,970 --> 00:05:03,600 If you're a Windows user, 107 00:05:03,600 --> 00:05:05,760 then please skip the next lecture 108 00:05:05,760 --> 00:05:08,060 and continue with the following lecture. 109 00:05:08,060 --> 00:05:11,490 Where we will dive into the Command Prompt basics. 110 00:05:11,490 --> 00:05:13,240 Therefore, for any Mac user 111 00:05:13,240 --> 00:05:15,590 who wants to find out more about the Terminal, 112 00:05:15,590 --> 00:05:17,410 see you in the next lecture. 113 00:05:17,410 --> 00:05:19,370 There we'll dive into the basics 114 00:05:19,370 --> 00:05:22,283 of the Terminal, specifically of the z Shell.