1 00:00:02,090 --> 00:00:04,700 In this lecture, we'll learn the basics 2 00:00:04,700 --> 00:00:07,890 about the Matco S command line 3 00:00:07,890 --> 00:00:10,990 interface, specifically the terminal. 4 00:00:10,990 --> 00:00:14,136 So how can we interact with our Mac computer, 5 00:00:14,136 --> 00:00:16,770 with the command line? 6 00:00:16,770 --> 00:00:18,380 For this the first thing we'll do 7 00:00:18,380 --> 00:00:21,820 is we'll bring up the command line interface 8 00:00:21,820 --> 00:00:23,690 Mac computers ship with. 9 00:00:23,690 --> 00:00:26,900 And this is the so-called terminal. 10 00:00:26,900 --> 00:00:28,460 To open the terminal, 11 00:00:28,460 --> 00:00:31,195 as basically for any program on Mac computers, 12 00:00:31,195 --> 00:00:35,240 we can simply open the spotlight search with command and 13 00:00:35,240 --> 00:00:38,623 space and there search for terminal. 14 00:00:39,980 --> 00:00:43,180 With enter we can then open a new terminal window 15 00:00:44,410 --> 00:00:45,590 Like this here. 16 00:00:45,590 --> 00:00:49,730 And I'll use command plus to zoom in a bit to make it better 17 00:00:49,730 --> 00:00:53,760 readable for you and maybe put it right here. 18 00:00:53,760 --> 00:00:56,960 Now, before we dive deeper, one quick note. 19 00:00:56,960 --> 00:01:00,160 As you saw, we just opened the terminal, 20 00:01:00,160 --> 00:01:04,220 which is the command line interface, the Mac offers. 21 00:01:04,220 --> 00:01:08,263 But you can also find this zat sh word up here. 22 00:01:09,270 --> 00:01:12,730 Once the terminal is so to say the hardware. 23 00:01:12,730 --> 00:01:14,860 So basically this thing here, 24 00:01:14,860 --> 00:01:18,830 which allows us to run the commands in the end. 25 00:01:18,830 --> 00:01:20,750 The zat sh, the zat shell 26 00:01:20,750 --> 00:01:24,100 is the software inside the terminal. 27 00:01:24,100 --> 00:01:26,260 That's basically how you can remember this. 28 00:01:26,260 --> 00:01:29,550 So you open a terminal and the terminal runs the zat shell 29 00:01:29,550 --> 00:01:33,180 software to then execute the commands we enter. 30 00:01:33,180 --> 00:01:35,220 I don't want to dive too deep here 31 00:01:35,220 --> 00:01:36,620 as it's not important 32 00:01:36,620 --> 00:01:38,330 for the purpose of this course. 33 00:01:38,330 --> 00:01:40,690 But if you select the terminal window, 34 00:01:40,690 --> 00:01:44,100 you can see the terminal up here and the shell over there. 35 00:01:44,100 --> 00:01:47,220 Therefore the differentiation between terminal and shell is 36 00:01:47,220 --> 00:01:49,140 something you might come across. 37 00:01:49,140 --> 00:01:50,973 Therefore, I wanted to mention this. 38 00:01:52,020 --> 00:01:53,900 Talking about this menu options. 39 00:01:53,900 --> 00:01:56,410 If you click onto the shell, you can see 40 00:01:56,410 --> 00:01:59,260 that you have multiple options in here. 41 00:01:59,260 --> 00:02:00,351 One interesting option is 42 00:02:00,351 --> 00:02:03,260 while the option to open a new shell 43 00:02:03,260 --> 00:02:04,710 or a new terminal window, 44 00:02:04,710 --> 00:02:06,900 I use both interchangeably now. 45 00:02:06,900 --> 00:02:09,440 And in here you can either open a new window 46 00:02:09,440 --> 00:02:10,704 with the basic profile, 47 00:02:10,704 --> 00:02:13,070 which will be this white one here, 48 00:02:13,070 --> 00:02:15,377 or with any other default profiles 49 00:02:15,377 --> 00:02:18,140 the Mac computer here ships with. 50 00:02:18,140 --> 00:02:20,717 For example, if I select this Homebrew profile. 51 00:02:20,717 --> 00:02:22,345 You see, I have this well, black 52 00:02:22,345 --> 00:02:26,725 and green look doesn't change anything about the logic. 53 00:02:26,725 --> 00:02:29,040 As you see, it's still the zat shell. 54 00:02:29,040 --> 00:02:30,900 It just looks different. 55 00:02:30,900 --> 00:02:33,390 If you want to close the terminal window, you can, 56 00:02:33,390 --> 00:02:35,340 of course also go to the shell up here 57 00:02:35,340 --> 00:02:37,320 and select the window you want to close 58 00:02:37,320 --> 00:02:39,113 and then press close window. 59 00:02:40,259 --> 00:02:43,770 So with that, we opened this terminal. 60 00:02:43,770 --> 00:02:47,457 Now I also want to open a finder window to show you 61 00:02:47,457 --> 00:02:49,524 the contrast between the CLI 62 00:02:49,524 --> 00:02:53,075 and the GUI, the graphical user interface. 63 00:02:53,075 --> 00:02:56,360 So let's open a new finder window. 64 00:02:56,360 --> 00:02:57,640 Here we go. 65 00:02:57,640 --> 00:03:01,730 And I selected Academind's Mac mini option here 66 00:03:01,730 --> 00:03:03,060 on the locations. 67 00:03:03,060 --> 00:03:06,100 There you should also find your computer. 68 00:03:06,100 --> 00:03:09,788 If this is not the case, make sure to select the finder, 69 00:03:09,788 --> 00:03:13,423 go to define their option and there to preferences. 70 00:03:14,680 --> 00:03:18,270 There select the sidebar which I selected already. 71 00:03:18,270 --> 00:03:22,500 And there under locations make sure to select your computer. 72 00:03:22,500 --> 00:03:26,090 So tick this box next to your computer's name. 73 00:03:26,090 --> 00:03:27,830 Then you can close this window 74 00:03:27,830 --> 00:03:30,540 and then you should also find this option. 75 00:03:30,540 --> 00:03:32,380 It's important to have this option 76 00:03:32,380 --> 00:03:33,630 because if you selected, 77 00:03:33,630 --> 00:03:36,660 you should see something like I have right here. 78 00:03:36,660 --> 00:03:38,550 Maybe without the Scarlet option, 79 00:03:38,550 --> 00:03:41,267 but you should find your well Macintosh HD, 80 00:03:41,267 --> 00:03:43,193 and you can select this. 81 00:03:44,240 --> 00:03:49,240 Now we have on top the CLI, at the bottom, the GUI 82 00:03:49,460 --> 00:03:51,750 and whilst for the GUI, 83 00:03:51,750 --> 00:03:55,410 we see that we are inside this Macintosh HD folder now. 84 00:03:55,410 --> 00:03:58,380 I'll come back to this folder in a few minutes. 85 00:03:58,380 --> 00:04:02,513 We have no idea where we actually are in our CLI. 86 00:04:03,550 --> 00:04:06,630 Well, as its a command line interface. 87 00:04:06,630 --> 00:04:09,830 This means we run commands to tell our computer what we want 88 00:04:09,830 --> 00:04:12,010 to see or what we want to do. 89 00:04:12,010 --> 00:04:14,950 We can run our first command to see well, 90 00:04:14,950 --> 00:04:17,279 where we currently are. 91 00:04:17,279 --> 00:04:21,370 The command I want to run first is PWD. 92 00:04:21,370 --> 00:04:24,390 This stands for print working directory 93 00:04:24,390 --> 00:04:28,480 and tells the machine to well print where we currently are. 94 00:04:28,480 --> 00:04:31,070 So which path we currently follow 95 00:04:31,070 --> 00:04:32,920 on our machine. 96 00:04:32,920 --> 00:04:35,290 With enter we can confirm this command 97 00:04:36,500 --> 00:04:38,090 and you see that we are currently 98 00:04:38,090 --> 00:04:42,033 in slash users slash Manuel Lorenz. 99 00:04:42,890 --> 00:04:45,580 Now this doesn't help us too much, I guess, 100 00:04:45,580 --> 00:04:50,580 but if we go down to the GUI into this HD folder. 101 00:04:50,900 --> 00:04:54,900 Then we also have this user's folder, which we can select. 102 00:04:54,900 --> 00:04:57,270 And now this looks different on your machine, 103 00:04:57,270 --> 00:05:00,403 but you should find your user name right here. 104 00:05:00,403 --> 00:05:02,805 And if you click onto this user name, 105 00:05:02,805 --> 00:05:06,680 well, then my assumption would be that we are currently 106 00:05:06,680 --> 00:05:08,310 in the same folder. 107 00:05:08,310 --> 00:05:11,880 We are in slash users in the CLI 108 00:05:11,880 --> 00:05:14,610 and in the user's folder in the GUI. 109 00:05:15,940 --> 00:05:20,744 The problem is that in the CLI we cannot see the folders 110 00:05:20,744 --> 00:05:24,400 and the files, this folder contains. 111 00:05:24,400 --> 00:05:27,770 Now that's actually the next command we could run. 112 00:05:27,770 --> 00:05:29,670 So we could tell our computer, well, 113 00:05:29,670 --> 00:05:31,870 please show me what this folder, 114 00:05:31,870 --> 00:05:33,983 this user folder here contains. 115 00:05:35,040 --> 00:05:36,230 We have a command for this. 116 00:05:36,230 --> 00:05:41,230 And this command is LS. LS stands for list items. 117 00:05:41,480 --> 00:05:45,540 And this lists all folders and files inside the folder, 118 00:05:45,540 --> 00:05:47,073 where we currently are. 119 00:05:48,240 --> 00:05:49,270 This is the folder. 120 00:05:49,270 --> 00:05:52,720 With enter we can also execute this command. 121 00:05:52,720 --> 00:05:54,960 And if we take a close look, 122 00:05:54,960 --> 00:05:59,960 we can see that the folders we in our CLI are equal 123 00:06:00,110 --> 00:06:03,400 to bonds in our GUI at the bottom. 124 00:06:03,400 --> 00:06:06,760 And that's a very important takeaway already. 125 00:06:06,760 --> 00:06:11,180 The logic or the way we interact with our computer 126 00:06:11,180 --> 00:06:14,610 is the same for the CLI and the GUI. 127 00:06:14,610 --> 00:06:17,563 So for the computer the commands are basically the same. 128 00:06:18,992 --> 00:06:21,840 By clicking onto this user folder, I see the folders 129 00:06:21,840 --> 00:06:22,980 it contains. 130 00:06:22,980 --> 00:06:26,960 By entering LS, I see the files and folders it contains. 131 00:06:26,960 --> 00:06:28,410 So it's the same logic, 132 00:06:28,410 --> 00:06:31,330 but without the graphical user interface. 133 00:06:31,330 --> 00:06:34,860 Which allows us to have this, well, nice clicking feature. 134 00:06:34,860 --> 00:06:38,040 And also to get a nice overview of all the folders 135 00:06:38,040 --> 00:06:39,800 in the hierarchy and so on. 136 00:06:39,800 --> 00:06:41,270 But it doesn't make a difference 137 00:06:41,270 --> 00:06:43,260 from a system point of view. 138 00:06:43,260 --> 00:06:47,470 We can have the same access with the CLI that we get 139 00:06:47,470 --> 00:06:48,303 with the GUI. 140 00:06:50,170 --> 00:06:51,980 Talking about access. 141 00:06:51,980 --> 00:06:56,310 Let's come back to this Macintosh HD folder 142 00:06:56,310 --> 00:06:58,680 or option that we have right here. 143 00:06:58,680 --> 00:07:00,700 Because if we select it we see 144 00:07:00,700 --> 00:07:03,180 that we have different folders in here. 145 00:07:03,180 --> 00:07:06,120 And at least this applications library system 146 00:07:06,120 --> 00:07:09,043 and user's folders should be the same on your machine. 147 00:07:11,020 --> 00:07:16,020 This directory, this folder, is the so-called root directory 148 00:07:16,250 --> 00:07:17,770 of your computer. 149 00:07:17,770 --> 00:07:19,560 So it's the top level directory. 150 00:07:19,560 --> 00:07:22,520 So to say on your hardest drive. 151 00:07:22,520 --> 00:07:25,150 And if we look at the so-called (indistinct) 152 00:07:25,150 --> 00:07:26,150 that we had up here. 153 00:07:26,150 --> 00:07:29,530 So this slash users slash user thing. 154 00:07:29,530 --> 00:07:33,416 We see that the working directory printing logic 155 00:07:33,416 --> 00:07:37,120 always starts from this root directory. 156 00:07:37,120 --> 00:07:42,120 Because basically here we are in Macintosh HD slash users. 157 00:07:43,620 --> 00:07:45,133 And then so on Manuel Lorenz. 158 00:07:46,430 --> 00:07:50,460 We can also navigate to this root directory easily 159 00:07:50,460 --> 00:07:52,423 in our CLI at the top. 160 00:07:53,460 --> 00:07:57,023 We can simply enter CD for change directory. 161 00:07:58,210 --> 00:08:01,270 Now, a space, and now a slash. 162 00:08:01,270 --> 00:08:03,973 This brings us to this root directory. 163 00:08:05,203 --> 00:08:06,036 If we press enter. 164 00:08:07,070 --> 00:08:09,840 And you get the hint that we are in the root territory 165 00:08:09,840 --> 00:08:11,393 by this slash right here. 166 00:08:12,320 --> 00:08:15,750 And now I've been running PWD again, you see, 167 00:08:15,750 --> 00:08:17,150 we are in slash. 168 00:08:17,150 --> 00:08:20,033 This means we are in the root directory. 169 00:08:20,970 --> 00:08:25,870 I can prove this to you by again, running LS so list items. 170 00:08:25,870 --> 00:08:28,900 And there you see, besides some hidden folders, 171 00:08:28,900 --> 00:08:32,799 which are displayed in the CLI, but not in the GUI. 172 00:08:32,799 --> 00:08:36,150 We have the applications folder, the library folder, 173 00:08:36,150 --> 00:08:39,049 the system folder, and the users folder. 174 00:08:39,049 --> 00:08:41,289 Just as we have these folders down here 175 00:08:41,289 --> 00:08:43,813 in our graphical user interface. 176 00:08:44,770 --> 00:08:48,290 Besides this root directory or this root folder, 177 00:08:48,290 --> 00:08:51,250 we also have another very common directory, 178 00:08:51,250 --> 00:08:55,000 and this is the directory of the currently active user 179 00:08:55,000 --> 00:08:57,760 of this MacBook. In my case, myself. 180 00:08:57,760 --> 00:09:00,333 And that's the so-called home directory. 181 00:09:01,410 --> 00:09:05,350 The home directory for my username is this one here. 182 00:09:05,350 --> 00:09:07,023 So if I click onto my username, 183 00:09:08,045 --> 00:09:09,350 that's the directory you are navigated to 184 00:09:09,350 --> 00:09:12,320 by default when opening the terminal. 185 00:09:12,320 --> 00:09:14,630 And we also have a shortcut to navigate 186 00:09:14,630 --> 00:09:18,117 into this folder in the CLI. 187 00:09:18,117 --> 00:09:21,740 And here, the shortcut is simply CD. 188 00:09:21,740 --> 00:09:25,110 So change directory without any additions. 189 00:09:25,110 --> 00:09:27,870 If I do this, you'll see that we have 190 00:09:27,870 --> 00:09:29,540 this tilde symbol here. 191 00:09:29,540 --> 00:09:33,620 Which indicates that we are in the home directory. 192 00:09:33,620 --> 00:09:36,970 And (indistinct) again, type LS you'll see 193 00:09:36,970 --> 00:09:39,800 that we have all the folders that we see 194 00:09:39,800 --> 00:09:43,003 in the GUI also in our CLI. 195 00:09:45,260 --> 00:09:47,240 So these are some more basics, 196 00:09:47,240 --> 00:09:50,720 root directory and home directory to easy to understand 197 00:09:50,720 --> 00:09:52,593 where you are in the terminal. 198 00:09:53,810 --> 00:09:57,130 We also had a look at this CD command now. 199 00:09:57,130 --> 00:10:00,330 Now, besides navigating into the root directory 200 00:10:00,330 --> 00:10:02,440 or into the home directory. 201 00:10:02,440 --> 00:10:05,251 We can also navigate one level up 202 00:10:05,251 --> 00:10:09,440 by entering CD in the space. And now two dots. 203 00:10:09,440 --> 00:10:12,430 We can leave the home directory in our case, 204 00:10:12,430 --> 00:10:15,020 we are currently in this directory. 205 00:10:15,020 --> 00:10:20,020 And with that move up one level to slash users. 206 00:10:20,070 --> 00:10:21,533 Now we are in here. 207 00:10:22,700 --> 00:10:24,150 To make this better readable, 208 00:10:25,029 --> 00:10:27,830 by the way, we can also run clear like this. 209 00:10:27,830 --> 00:10:29,440 If you confirmed this, you see 210 00:10:29,440 --> 00:10:32,363 that all previous commands are no longer displayed, 211 00:10:33,440 --> 00:10:34,960 But you can scroll up 212 00:10:34,960 --> 00:10:37,363 and still see all the previous commands are there. 213 00:10:37,363 --> 00:10:39,813 It just clears the current view of your terminal. 214 00:10:41,368 --> 00:10:44,180 Now we've CD dot dot. We navigated one level up. 215 00:10:44,180 --> 00:10:45,660 If I print the directory, 216 00:10:45,660 --> 00:10:48,260 you'll see we are indeed in slash users. 217 00:10:48,260 --> 00:10:49,920 If I type L S again, 218 00:10:49,920 --> 00:10:52,170 you'll see that we have the same folders 219 00:10:52,170 --> 00:10:54,187 that we can see in the user's directory 220 00:10:54,187 --> 00:10:56,413 in the graphical user interface, 221 00:10:57,400 --> 00:10:59,600 Besides navigating to the root directory, 222 00:10:59,600 --> 00:11:03,180 the home directory, and navigating one level up. 223 00:11:03,180 --> 00:11:07,550 We can also use C D to navigate into a specific folder, 224 00:11:07,550 --> 00:11:10,650 starting from the current folder. 225 00:11:10,650 --> 00:11:13,990 This means, in my case, we are in the user's folder here. 226 00:11:13,990 --> 00:11:17,383 So I could enter M and now hit tab. 227 00:11:18,430 --> 00:11:20,299 And now I get the options we have. 228 00:11:20,299 --> 00:11:22,330 Now I see that I can either navigate 229 00:11:22,330 --> 00:11:25,733 into my user folder or max user folder. 230 00:11:26,580 --> 00:11:30,709 I use my folder. So I'll type an A now. 231 00:11:30,709 --> 00:11:33,100 Now, an A is unique in this folder structure. 232 00:11:33,100 --> 00:11:36,000 No other folders start with M A 233 00:11:36,000 --> 00:11:38,170 therefore, if I hit tab once again. 234 00:11:38,170 --> 00:11:40,133 I can confirm this with enter. 235 00:11:41,240 --> 00:11:44,363 And now I am back in my home directory. 236 00:11:46,100 --> 00:11:48,820 Now, inside this directory, I could see what I have 237 00:11:48,820 --> 00:11:50,421 in there. 238 00:11:50,421 --> 00:11:52,140 So we see we have plenty of folders. 239 00:11:52,140 --> 00:11:55,943 We could say we navigate into the documents folder now. 240 00:11:57,389 --> 00:12:00,940 So this one. Let's do this by entering C D once again. 241 00:12:00,940 --> 00:12:05,920 Now enter D O C because we also have two downloads folder. 242 00:12:05,920 --> 00:12:10,310 So D O C again, is the documents folder. And a tab. 243 00:12:10,310 --> 00:12:12,693 And now we are inside this document's folder. 244 00:12:13,660 --> 00:12:16,020 We could also add another folder. 245 00:12:16,020 --> 00:12:19,500 Like test here slash and so on to navigate 246 00:12:19,500 --> 00:12:20,653 into this folder too. 247 00:12:22,133 --> 00:12:23,576 We don't have such a folder here. 248 00:12:23,576 --> 00:12:25,940 Therefore, we'll just go into the documents folder. 249 00:12:25,940 --> 00:12:27,420 Let's do this. 250 00:12:27,420 --> 00:12:31,024 Now we see that we are currently in the documents folder. 251 00:12:31,024 --> 00:12:34,030 And there we could also list our items once again. 252 00:12:34,030 --> 00:12:36,780 And now we get a warning that our terminal would like 253 00:12:36,780 --> 00:12:38,640 to access this documents folder. 254 00:12:38,640 --> 00:12:40,700 So we can confirm this. 255 00:12:40,700 --> 00:12:42,810 Therefore we see in this folder, well, 256 00:12:42,810 --> 00:12:46,370 we only have one folder in one file at the moment. 257 00:12:46,370 --> 00:12:50,910 We can, again, also confirm this in our GUI. 258 00:12:50,910 --> 00:12:54,313 So many Lorenz documents, only this folder. 259 00:12:55,308 --> 00:12:57,710 So this is the navigation part. 260 00:12:57,710 --> 00:13:00,890 But as we don't have any files and folders, 261 00:13:00,890 --> 00:13:03,550 besides this adult folder, in my case. 262 00:13:03,550 --> 00:13:06,830 Why don't we add a new folder and then a new file 263 00:13:06,830 --> 00:13:09,143 inside of this folder as a next step. 264 00:13:10,040 --> 00:13:11,557 We could do this with the GUI. 265 00:13:12,835 --> 00:13:15,520 But it's also possible from the terminal. 266 00:13:15,520 --> 00:13:19,000 To create a new folder inside the current location, 267 00:13:19,000 --> 00:13:22,450 you can simply type M K D I R, 268 00:13:22,450 --> 00:13:24,623 make or create directory. 269 00:13:25,520 --> 00:13:28,320 What you then have to enter is the directory name. 270 00:13:28,320 --> 00:13:29,680 So we could call this 271 00:13:30,768 --> 00:13:35,768 WEB DEV minus course, maybe. 272 00:13:36,090 --> 00:13:39,970 And with this, you already see the confirmation in the GUI. 273 00:13:41,067 --> 00:13:42,860 We created this new folder. 274 00:13:42,860 --> 00:13:47,520 Now we can navigate into this folder with well CD. 275 00:13:47,520 --> 00:13:51,330 And now we type web, and now with tab we can complete it. 276 00:13:51,330 --> 00:13:52,790 Confirm it with enter. 277 00:13:52,790 --> 00:13:55,913 And now we are inside the WEB DEV course folder. 278 00:13:57,736 --> 00:14:00,699 Now let's add a file to this folder, maybe. 279 00:14:00,699 --> 00:14:02,221 And we also have a command for this. 280 00:14:02,221 --> 00:14:05,743 The other command is simply touch now a space. 281 00:14:06,704 --> 00:14:10,560 And now we add the file name, including the file extension. 282 00:14:10,560 --> 00:14:13,000 I would like to make things easier. 283 00:14:13,000 --> 00:14:18,000 So I would simply create a dummy dot text file. 284 00:14:19,600 --> 00:14:20,783 Let's run this command. 285 00:14:23,010 --> 00:14:26,700 And with L S now we should see 286 00:14:26,700 --> 00:14:29,700 that dummy dot text was created. 287 00:14:29,700 --> 00:14:31,840 And indeed it was. 288 00:14:31,840 --> 00:14:34,980 We can, again, confirm this in the WEB DEV course folder. 289 00:14:34,980 --> 00:14:36,423 There. we see this file. 290 00:14:38,020 --> 00:14:39,883 Let me now clear this once again. 291 00:14:41,803 --> 00:14:43,970 And besides creating folders and files, we can, 292 00:14:43,970 --> 00:14:47,080 of course also delete folders and files. 293 00:14:47,080 --> 00:14:50,750 A little warning here. This is just a quick introduction. 294 00:14:50,750 --> 00:14:54,473 Therefore, I will not dive too deep into this deletion part. 295 00:14:56,196 --> 00:14:58,623 But if you delete files or folders via the CLI, 296 00:14:59,930 --> 00:15:02,400 you have no trash or anything like this. 297 00:15:02,400 --> 00:15:06,170 So you barely have a chance to recover any deleted items. 298 00:15:06,170 --> 00:15:08,840 So you should be sure what you delete. 299 00:15:08,840 --> 00:15:10,943 Therefore, I'll show you the command, 300 00:15:11,917 --> 00:15:14,800 how you can delete files and empty folders. 301 00:15:14,800 --> 00:15:17,363 So in case the folder contains any files, 302 00:15:17,363 --> 00:15:18,760 the command I show you now 303 00:15:18,760 --> 00:15:21,480 for deleting the folder won't work. 304 00:15:21,480 --> 00:15:23,650 Let's first delete the file though. 305 00:15:23,650 --> 00:15:27,320 For this, I am still in the WEB DEV course folder. 306 00:15:27,320 --> 00:15:32,200 I now type R M for remove, then a space. 307 00:15:32,200 --> 00:15:35,400 And then I refer to the file I want to delete. 308 00:15:35,400 --> 00:15:38,320 So in my case, dummy dot tex. 309 00:15:38,320 --> 00:15:40,513 That's the file inside this folder. 310 00:15:41,380 --> 00:15:45,420 If we run this command, we don't get any confirmation 311 00:15:45,420 --> 00:15:47,210 that the deletion was successful. 312 00:15:47,210 --> 00:15:50,603 But in the GUI again, you see, well, the file is gone. 313 00:15:51,950 --> 00:15:54,270 If I would now create another file 314 00:15:55,860 --> 00:15:59,893 with touch test dot text, maybe. 315 00:16:02,848 --> 00:16:03,681 This would be here again. 316 00:16:04,851 --> 00:16:09,150 And now if you use CD space dot dot to move one level up 317 00:16:09,150 --> 00:16:10,913 in our folder hierarchy. 318 00:16:11,840 --> 00:16:14,900 Then I could also try to delete this folder. 319 00:16:14,900 --> 00:16:18,700 Deleting folders works also with the RM command. 320 00:16:18,700 --> 00:16:22,253 But here we use R M dir for directory. 321 00:16:23,200 --> 00:16:25,110 Now we can enter the name of the directory 322 00:16:25,110 --> 00:16:26,260 that we want to delete. 323 00:16:27,208 --> 00:16:29,131 So in our case, WEB DEV. 324 00:16:29,131 --> 00:16:30,543 With tab we can complete this. 325 00:16:32,010 --> 00:16:33,523 We don't need to slash though. 326 00:16:35,616 --> 00:16:39,230 And now if I run this, you see, this is not working. 327 00:16:39,230 --> 00:16:42,920 This is what I was mentioning a few seconds ago. 328 00:16:42,920 --> 00:16:44,480 For the purpose of this course, 329 00:16:44,480 --> 00:16:46,860 I will only show you this deletion commands 330 00:16:46,860 --> 00:16:49,380 to make sure you can't delete directories 331 00:16:49,380 --> 00:16:51,653 that contain any files or folders. 332 00:16:52,520 --> 00:16:54,480 Therefore right here we should navigate 333 00:16:54,480 --> 00:16:57,180 into the WEB DEV course folder 334 00:16:58,630 --> 00:17:01,390 with CD like this. 335 00:17:01,390 --> 00:17:06,390 Now run RM for remove test dot text and remove the file. 336 00:17:08,069 --> 00:17:13,069 Now again, use CD dot dot to move one level up. 337 00:17:13,579 --> 00:17:16,099 And now we can run RM dir. 338 00:17:16,099 --> 00:17:18,220 So to remove the directory 339 00:17:18,220 --> 00:17:21,210 and remove the WEB DEV course directory. 340 00:17:21,210 --> 00:17:23,430 Slash doesn't play a role here. 341 00:17:23,430 --> 00:17:25,400 If we do this now, you'll see 342 00:17:25,400 --> 00:17:28,373 in the GUI at the bottom that this was deleted. 343 00:17:29,210 --> 00:17:32,900 And this is actually more than you actually need to work 344 00:17:32,900 --> 00:17:35,850 with, get and get up from the terminal. 345 00:17:35,850 --> 00:17:39,640 Therefore we're done with the terminal introduction 346 00:17:39,640 --> 00:17:41,950 on Mac OS systems. 347 00:17:41,950 --> 00:17:46,040 If you also want to find out what the windows command prompt 348 00:17:46,040 --> 00:17:49,330 looks like, feel free to dive in to the next lecture. 349 00:17:49,330 --> 00:17:53,130 Otherwise please skip the following lecture and continue 350 00:17:53,130 --> 00:17:54,860 with the lecture afterwards, 351 00:17:54,860 --> 00:17:57,307 where we will finally dive into (indistinct).