WEBVTT 00:00.990 --> 00:06.430 So pipes are essential part of the Linux enterprise. 00:06.450 --> 00:11.640 So here, let's dive into building your piping skills with a small set of Linux commands. 00:11.640 --> 00:16.050 So no matter which one you encounter later, you will need to combine them. 00:16.050 --> 00:20.280 So we will learn here the let's actually draw this. 00:20.280 --> 00:21.660 So I will draw this here. 00:21.660 --> 00:26.430 So you will learn about firstly the w oops here. 00:26.430 --> 00:27.000 Yeah. 00:27.090 --> 00:31.020 W c you will learn heat. 00:35.430 --> 00:36.690 You will learn Heath here. 00:36.690 --> 00:38.850 So you will also learn Cut. 00:40.590 --> 00:42.780 You will learn about the grip. 00:44.010 --> 00:44.700 Grab. 00:47.100 --> 00:49.260 You will learn Sword. 00:49.260 --> 00:50.910 And here. 00:50.910 --> 00:51.900 Sword. 00:53.160 --> 00:55.980 One, two, three, four, five. 00:55.980 --> 00:57.690 And unique. 01:02.960 --> 01:05.810 And also, yeah, it's six here. 01:05.970 --> 01:08.410 Yeah, also here. 01:08.420 --> 01:09.680 So let's get started. 01:09.950 --> 01:10.730 So. 01:11.670 --> 01:20.190 These comments have numerous options and modes of operations that will I largely skip for now. 01:20.250 --> 01:22.320 Just now to focus on pipes. 01:22.320 --> 01:33.000 So to learn more about any command random man command, here is why It's like, yeah, run the man command. 01:33.270 --> 01:33.660 Oops. 01:33.660 --> 01:34.140 Yeah. 01:34.230 --> 01:36.690 Run the man command like this. 01:37.920 --> 01:46.560 And for example, if I wanted to get get an information about the LHS, then the man command will give 01:46.560 --> 01:53.490 me a detailed description, the name, synopsis, description and all of the information that I need 01:53.520 --> 01:54.120 here. 01:54.150 --> 02:00.210 Actually, we did learn this in previous lectures, but I just wanted to mention it again. 02:00.210 --> 02:01.500 So here. 02:02.630 --> 02:06.200 Let's get started with the WC command. 02:06.410 --> 02:06.950 It's actually. 02:06.970 --> 02:07.360 Yeah. 02:07.820 --> 02:08.290 Here. 02:08.300 --> 02:08.960 Clear. 02:08.990 --> 02:09.900 WC command. 02:09.920 --> 02:16.570 So the WC command prints the number of lines, words and characters in a file. 02:16.580 --> 02:23.180 So let's actually use the for the for now, let's use the user interface for creating files. 02:23.180 --> 02:29.330 But in next lectures you will also learn how to create, delete and manipulate files from the command 02:29.330 --> 02:29.930 line. 02:29.930 --> 02:38.240 So here, let's create a right click on it, Create document, empty file, and let's name this file 02:38.780 --> 02:39.200 here. 02:39.200 --> 02:39.650 Oxley. 02:40.160 --> 02:41.090 Oxley. 02:41.120 --> 02:42.080 Create. 02:42.080 --> 02:43.430 And here. 02:44.560 --> 02:45.400 Delete this. 02:45.400 --> 02:47.170 Don't save here. 02:48.670 --> 02:52.240 Let's increase the font size a little bit and write something here. 02:52.240 --> 02:52.690 So. 02:52.720 --> 02:53.560 Oxley. 02:53.590 --> 02:55.000 Oxley Academy. 02:55.030 --> 02:57.880 Typhoon Online. 02:57.880 --> 02:59.950 Linux Course. 03:01.200 --> 03:01.980 A YouTube. 03:02.320 --> 03:03.450 YouTube. 03:03.780 --> 03:07.440 We are on YouTube here. 03:07.980 --> 03:08.900 Oxley. 03:09.090 --> 03:09.930 And here. 03:09.930 --> 03:19.350 This is our text for now and we will use WC animals to print the number of lines, words and characters 03:19.350 --> 03:19.910 in a file. 03:19.920 --> 03:20.760 So. 03:21.830 --> 03:23.690 It's going to be like Oxley. 03:24.020 --> 03:32.240 OXLEY And here, as you can see here, we have five lines here and 83 characters. 03:32.240 --> 03:36.590 And we also have five words in this file lines here. 03:36.590 --> 03:39.110 So let's open what we have as a word. 03:39.110 --> 03:42.980 As you can see here, these all of them, it counts as a word here. 03:42.980 --> 03:47.210 So let's add something with a space here and run this command. 03:47.210 --> 03:54.920 Again, as you can see here, we got 96 characters, six lines, six words and five lines here. 03:54.920 --> 04:03.710 So WC reports that our Oxley has five lines, six words, 96 characters. 04:03.710 --> 04:13.400 So if you count the characters by eye, including here spaces, types and new lines, you will find 04:13.430 --> 04:15.110 96 characters. 04:15.110 --> 04:15.500 So. 04:15.500 --> 04:22.260 But WC also includes the invisible New Line character that ends each line. 04:22.260 --> 04:33.630 So the option here wc here, for example, wc l, w and C instructs wc to print only the number of lines, 04:33.630 --> 04:37.470 words and characters respectively here if I wanted to. 04:37.500 --> 04:44.850 For example, l wc l Oxley and here, as you can see here, we have file five here. 04:44.850 --> 04:45.480 So. 04:45.780 --> 04:47.640 So we printed the lines here. 04:47.640 --> 05:00.330 So if we write it like this wc c as a parameter or Yeah w as a parameter, we will print the words here 05:00.720 --> 05:02.400 and wc. 05:04.360 --> 05:05.920 C as a parameter. 05:05.920 --> 05:08.470 We will print the characters as a c. 05:08.620 --> 05:13.270 For characters W for words and L for lines. 05:13.270 --> 05:22.600 So containing is such a useful general purpose task that the authors of WC designed the command to work 05:22.600 --> 05:23.320 with pipes. 05:23.320 --> 05:26.170 So it reads from the stdin. 05:26.200 --> 05:35.320 If you omit the file name and it writes to the stdout so let's use the less and less contents of the 05:35.320 --> 05:39.130 current directory and pipe them to wc to count lines. 05:39.130 --> 05:45.370 So the pipeline answers the question how many lines are visible in my current directory here? 05:45.370 --> 05:49.630 And for example, ls l here or LZ one? 05:49.630 --> 05:53.890 And as you can see, we have these files and folders in our directory. 05:53.890 --> 06:05.180 So if you write like that here, so LZ one and LZ one and we are using Pipeline WC one or L here, we 06:05.180 --> 06:06.320 will get ten. 06:06.320 --> 06:08.090 So let's count here. 06:08.120 --> 06:15.020 One, two, three, four, five, six, seven, eight, ten, 11. 06:15.590 --> 06:19.490 One, two, three, four, five, six, seven, ten, 11. 06:19.520 --> 06:20.060 Oops. 06:20.210 --> 06:25.130 One, two, three, four, five, six, seven, ten, 11, 12. 06:25.130 --> 06:27.620 So we have 12 files here. 06:28.130 --> 06:29.840 12 lines here. 06:30.630 --> 06:31.890 As you can see here. 06:31.890 --> 06:33.360 Let's delete all of them. 06:34.840 --> 06:39.450 So that's because we have, uh, the LZ. 06:39.460 --> 06:42.130 We counted the L with LZ one. 06:42.130 --> 06:45.010 We counted all of these folders here. 06:45.250 --> 06:46.510 That's clear here. 06:46.600 --> 06:47.950 So now. 06:50.550 --> 06:52.890 Now let's actually write something. 06:56.020 --> 06:58.230 So let's see. 06:58.270 --> 06:59.740 WC is the first command. 06:59.770 --> 07:04.990 You have seen in this lecture, so you are a bit limited in what you can do with pipes. 07:04.990 --> 07:09.610 So just for fun, the pipe, the output of WC itself. 07:09.610 --> 07:14.530 So demonstrating that the same command can appear more than once in a pipeline. 07:14.530 --> 07:20.740 So this combines command reports that a number of words in the output of VC is a four. 07:20.740 --> 07:21.310 So. 07:22.700 --> 07:24.930 Let's make this like that here. 07:24.950 --> 07:29.590 So we're going to use the WC or Oxalaia here. 07:29.600 --> 07:30.380 Oxalaia. 07:31.640 --> 07:31.970 And the. 07:33.970 --> 07:34.630 Why? 07:34.990 --> 07:35.610 Yeah. 07:35.620 --> 07:36.160 Why? 07:36.220 --> 07:37.270 No, there's no such. 07:38.590 --> 07:39.280 Yes. 07:39.280 --> 07:40.270 We gone here. 07:40.300 --> 07:41.860 LZ here. 07:41.890 --> 07:42.610 LZ. 07:42.730 --> 07:43.480 Yeah. 07:43.600 --> 07:44.440 Oxley here. 07:44.440 --> 07:47.170 So WC Oxley. 07:47.470 --> 07:50.410 And here we have this here. 07:50.410 --> 07:54.170 So if we write it like that WC and or Oxley. 07:54.190 --> 07:58.960 Oxley and WC w again. 07:58.960 --> 08:03.580 And as you can see here, we got four here because we are printed here. 08:03.580 --> 08:06.460 So let's actually what that this is interesting here. 08:06.580 --> 08:07.480 So. 08:08.320 --> 08:10.180 This was our output, right? 08:10.540 --> 08:13.120 So our output was five. 08:13.150 --> 08:13.380 Oops. 08:13.390 --> 08:15.160 Actually, it's here. 08:15.160 --> 08:15.640 Yeah. 08:15.790 --> 08:21.550 Our output was five, 696. 08:23.110 --> 08:24.010 And Oxley. 08:24.010 --> 08:24.550 Yeah. 08:25.120 --> 08:26.270 Oxley. 08:26.290 --> 08:26.590 Oops. 08:26.650 --> 08:27.130 Yeah. 08:27.160 --> 08:27.970 Oxley. 08:30.670 --> 08:32.830 So here, let's count it. 08:32.860 --> 08:35.860 So this is our first word. 08:35.890 --> 08:37.600 Two, three. 08:38.360 --> 08:49.340 And for so as you can see here with this command, we get the four words and we gave this command to. 08:50.050 --> 08:51.730 WC w here. 08:51.730 --> 08:57.700 That's so as you know, we are getting with WCW, we are getting words here. 08:57.700 --> 09:02.140 So we got four and not six here. 09:02.140 --> 09:08.560 So that's an interesting type with the Linux commands here. 09:11.530 --> 09:15.160 And let's actually do one more example. 09:15.310 --> 09:15.880 Why stop here? 09:15.880 --> 09:16.390 Right? 09:16.510 --> 09:26.950 So let's add a third command to the pipeline of the count lines, words and characters in the output 09:26.950 --> 09:27.250 form. 09:28.060 --> 09:31.930 So in order to do that, we will hear. 09:32.860 --> 09:33.130 Oops. 09:33.130 --> 09:34.060 Why are you doing this yet? 09:34.300 --> 09:35.200 Clear. 09:35.500 --> 09:39.130 So our output was Oxley here. 09:39.160 --> 09:44.170 WC And as you can see, we got a four in previous code command. 09:44.500 --> 09:48.640 So WC Oxley and here. 09:48.670 --> 09:54.370 WC w and we are using again here, so we're going to use the WC here. 09:54.370 --> 10:04.550 So here the output indicates one line containing the number four, uh, one word containing the number 10:04.600 --> 10:07.390 four itself and two characters here. 10:07.390 --> 10:09.940 And as you can see here, one, one, two. 10:10.060 --> 10:13.780 So here, here. 10:15.370 --> 10:16.540 For here. 10:16.540 --> 10:21.100 The four ends with an invisible new line character here. 10:21.100 --> 10:25.300 So for ends with an invisible new line character. 10:25.300 --> 10:28.150 That's why we got this output here. 10:28.150 --> 10:32.090 So that's enough with the silly pipelines with WQ. 10:32.200 --> 10:37.600 As you gain more commands, the pipelines will become more practical. 10:37.600 --> 10:39.490 So see you in next lecture.