WEBVTT 00:01.270 --> 00:06.670 The mkdir command is used to create directories. 00:06.670 --> 00:10.540 And here let's actually write our mkdir how it looks like here. 00:10.540 --> 00:15.490 So m k here that's actually make directory here. 00:15.490 --> 00:17.740 Basically make there. 00:17.980 --> 00:23.950 So here in order to work with MQTT here you're going to firstly use the mkdir and after that you will 00:23.950 --> 00:25.750 enter the directory name. 00:25.750 --> 00:33.400 So I was so here that when three periods full of an argument in the description of a command here, 00:33.400 --> 00:36.160 for example my dear one. 00:37.290 --> 00:39.570 So it means that the argument can be repeated. 00:39.570 --> 00:41.730 So do use here. 00:41.730 --> 00:47.450 With this we created just a single command in order to do more than one directory. 00:47.490 --> 00:48.060 So you will. 00:48.420 --> 00:57.960 You can also do this mkdir here, my dear, my dear to my dear three or my, my dear three, my dear 00:57.990 --> 01:00.810 four my special. 01:01.890 --> 01:05.430 And here, as you can see here we created my dear. 01:05.430 --> 01:07.200 One, two, three, four. 01:07.200 --> 01:09.270 And my special dear here. 01:09.270 --> 01:14.010 So we can also use the CP copy files and directories command here. 01:14.010 --> 01:16.680 Actually, let me write it right down here. 01:17.730 --> 01:18.390 Yeah. 01:18.390 --> 01:20.190 C p. 01:20.520 --> 01:22.500 Basically it's copies here. 01:22.500 --> 01:26.610 We can with this command, we can copy files and directories. 01:26.610 --> 01:32.610 As I said, the CP command copies, files and directories and it can be used in two different ways. 01:32.610 --> 01:37.450 So we can also actually let us see what we, what files we have. 01:37.480 --> 01:42.340 So this is our directory we will work in, This is our directory, we will, we're going to work in 01:42.340 --> 01:44.200 and this is our file. 01:44.200 --> 01:47.020 We're going to use the two CP command here. 01:47.020 --> 01:54.520 So, so first you will see, for example, feel my copied. 01:54.550 --> 01:54.910 Oops. 01:54.910 --> 01:55.270 Yeah. 01:55.270 --> 01:56.080 Copy it. 01:56.110 --> 02:00.220 Feel here and ls And as you can see, we created my copied field. 02:00.220 --> 02:04.180 So we copied this field to this here. 02:05.080 --> 02:06.010 So. 02:07.320 --> 02:08.520 We can also. 02:09.240 --> 02:13.980 Copy the single file or directory item one to the file or directory item two. 02:14.250 --> 02:16.230 So we can also do that for example. 02:16.270 --> 02:18.240 CPP file. 02:18.240 --> 02:21.120 And after that we will can also music here. 02:21.120 --> 02:24.480 And let's see the music. 02:24.720 --> 02:26.370 Music and ls here. 02:26.370 --> 02:34.110 And as you can see here, we copied our field file inside our music directory here. 02:34.410 --> 02:38.550 That's it with basic introduction of CPP command here. 02:38.550 --> 02:41.790 So you can also learn more information with CPP. 02:42.150 --> 02:48.450 And here, as you can see here, CPP is for used copy files and directories, copy source or to destination 02:48.450 --> 02:50.580 or multiple source to a directory. 02:50.580 --> 02:56.160 And mandatory arguments to long options are mandatory for short options too. 02:56.160 --> 03:03.510 And as you can see, we have archive attributes only backup the the reference preserve links and another 03:03.510 --> 03:07.950 commands here so you can also learn more about the CPP commands. 03:07.950 --> 03:12.310 It's actually most popular command, one of the most popular commands in Linux. 03:12.310 --> 03:13.180 So. 03:13.860 --> 03:16.500 Let's create an example with it right now. 03:16.500 --> 03:20.280 And firstly, let's actually use the MV command. 03:20.310 --> 03:24.510 M v command as the name suggests. 03:25.610 --> 03:26.090 Envy. 03:27.290 --> 03:31.460 Moves and is used for moving and renaming files in Linux. 03:31.460 --> 03:36.230 So the MOVE command performs both file and file renaming. 03:36.230 --> 03:40.690 So file moving and file renaming depending on how it is used. 03:40.700 --> 03:47.030 In either case, the original file name no longer exists after the operation, so env used in much the 03:47.030 --> 03:50.450 same way as a as a CP for example. 03:50.780 --> 03:51.350 Env. 03:51.380 --> 03:53.420 Firstly we're going to ls oops. 03:53.870 --> 03:54.470 Yeah. 03:54.830 --> 03:56.960 Env file here. 03:56.960 --> 04:06.560 And after that my renamed file and ls and as you can see we renamed the feel and the feel file no longer 04:06.560 --> 04:07.670 exists. 04:09.080 --> 04:10.130 Uh, in here. 04:10.130 --> 04:13.820 We with the commands, with E here. 04:13.850 --> 04:16.520 And we e we, we, we. 04:16.520 --> 04:17.960 This is the interactive means here. 04:17.960 --> 04:23.660 So before overwriting an existing file, prompt the user for confirmation. 04:23.660 --> 04:30.170 If the option is not specified, specified env will silently overwrite files. 04:30.170 --> 04:42.020 So for example, let's try with this env renamed renamed file and two old file old file. 04:42.020 --> 04:49.010 And and as you can see, this is specified without asking to, uh, do it or not. 04:49.680 --> 04:54.120 So let's actually learn about Air Command here. 04:54.150 --> 04:56.430 Air M here. 04:56.790 --> 04:58.650 Actually, let's make it a bit nicer. 04:58.650 --> 05:01.200 Air M. 05:02.470 --> 05:03.420 Here. 05:03.430 --> 05:05.650 This is, as the name suggests. 05:05.680 --> 05:08.110 Remove here. 05:08.260 --> 05:17.140 So the command is used to remove delete files and directories with just a single command. 05:17.170 --> 05:22.990 In order to do that, we're going to actually go here, clear here. 05:22.990 --> 05:25.440 And after that we will actually let loose. 05:25.510 --> 05:28.550 And as you can see, we have a file named Old file. 05:29.200 --> 05:30.220 Old file. 05:30.220 --> 05:33.220 And here, as you can see, we no longer have files here. 05:33.220 --> 05:37.030 So you can also use the same options. 05:37.030 --> 05:43.060 And in the previous env command, for example, you can also use the interactive. 05:43.060 --> 05:46.420 So torch some files. 05:46.480 --> 05:48.880 And here, as you can see, we created a new file. 05:49.210 --> 05:59.020 You can also come here and test and as you can see here now, it asks for do we want to remove the file? 05:59.560 --> 06:01.090 And and you can. 06:01.150 --> 06:01.820 Yes. 06:01.820 --> 06:06.440 And as you can see here, our file is removed. 06:07.320 --> 06:12.090 And we can also in the previous lecture we did learn creating links and hard links. 06:12.120 --> 06:18.000 Symbolic links which you will learn in more depth in next lecture. 06:18.000 --> 06:18.930 So I'm waiting you in. 06:18.930 --> 06:19.410 Next lecture.