WEBVTT 00:00.350 --> 00:03.410 Hello, my name is Typhoon and welcome to another lecture of our course. 00:03.440 --> 00:08.990 In this lecture of our course, you will learn about the traversing directories and you will use the 00:08.990 --> 00:10.760 absolute directories for references. 00:10.760 --> 00:12.110 So let's get started. 00:26.260 --> 00:32.920 So you can you change the directory to move your shell session to another directory in the Linux file 00:32.920 --> 00:33.400 system? 00:33.400 --> 00:37.450 So this CD command, this syntax is pretty simple. 00:37.450 --> 00:43.960 So you first enter the CD, which means change directory, and after that you enter the destination 00:43.960 --> 00:44.320 here. 00:44.320 --> 00:48.220 So the CD command may take a single argument as a destination here. 00:48.220 --> 00:51.670 So you will enter destination here. 00:51.670 --> 00:55.810 So which this destination specifies a directory you want to go. 00:56.020 --> 01:02.350 So if you don't specify a destination on the CD command, it takes you to your home directory here. 01:02.350 --> 01:10.000 So if you make it like that, CD downloads and after that CD and as you can see here we go to Home Directory 01:10.000 --> 01:10.630 again. 01:10.630 --> 01:17.860 So you will in this chapter you will learn the um, each of these methods and you will learn about the 01:17.860 --> 01:24.640 differences between these two methods are important to understand as you traverse the file system so 01:24.640 --> 01:31.220 you can reference a directory name with within the virtual directory system using the absolute directory 01:31.220 --> 01:31.730 reference. 01:31.730 --> 01:37.070 So the absolute directory reference defines exactly where the directory is in the virtual directory 01:37.070 --> 01:39.080 structure and starting at the root. 01:39.080 --> 01:44.120 So think of the absolute directory reference as the full name for the directory. 01:44.150 --> 01:52.190 So an absolute directory reference always begins with a forward slash indicating the virtual directory 01:52.190 --> 01:53.450 system's root. 01:53.450 --> 02:01.040 So fuse to reference user binaries contained within the user directories. 02:01.310 --> 02:08.120 Bind bind some directory here so you you will use so user here and here you can. 02:08.420 --> 02:12.860 As you can see whenever I click to the tab here, oops, here. 02:12.950 --> 02:20.570 So whenever I click the tab button on my keyboard it will show make. 02:21.320 --> 02:24.950 Uh, possible inputs for my command here. 02:24.950 --> 02:29.330 So in this case, we will enter the bin here so usr bin. 02:29.330 --> 02:32.600 And as you can see, we changed our directory to usr bin. 02:32.600 --> 02:36.470 So there's no w as to exactly where you want to go. 02:36.470 --> 02:41.990 So to move to a specific location on the file system using the absolute directory or reference, you 02:41.990 --> 02:46.250 just specify the path name in the C command. 02:46.250 --> 02:47.780 So we can also do like that. 02:47.780 --> 02:49.460 For example, let's make it go to home. 02:49.460 --> 02:55.220 And as you can see, we are in the home and let's go to user bin user. 02:56.530 --> 02:57.490 USR bin. 02:59.580 --> 03:03.990 And as you can see here, we changed our directory to usr bin here. 03:04.830 --> 03:14.280 Also, did you notice that the this example that the prompt originally had a title here, had a title 03:14.280 --> 03:21.270 in it, and after that change to Native Directory occurred, the title was replaced by being here. 03:21.270 --> 03:22.310 As you can see here. 03:22.320 --> 03:28.860 Firstly, we had a title here, but whenever we clicked and changed the directory there, we showed 03:28.860 --> 03:30.470 us that we are you. 03:30.510 --> 03:34.920 We are at a different directory other than our home directory here. 03:34.920 --> 03:40.680 So this is where the command line interface prompt can help you keep track of where you are in the virtual 03:40.680 --> 03:41.730 directory structure. 03:41.730 --> 03:47.970 So the tiled indicates that your cell session is located in your home directory. 03:47.970 --> 03:48.750 Like this, for example. 03:48.750 --> 03:52.710 Let's go to home and as you can see, we are in the home now. 03:53.570 --> 04:00.530 So after you move out of your home directory, the partial directory reference is shown in the prompt. 04:00.530 --> 04:03.220 So if the prompt has been configured to do so. 04:03.230 --> 04:10.100 So if your prompt has not been configured to show the shell session current absolute directory location, 04:10.100 --> 04:13.970 then you can display the location via a shell command. 04:14.000 --> 04:22.450 The WD command displays the shell session's current directory location, which is called the present 04:22.460 --> 04:22.760 actual. 04:22.760 --> 04:24.380 Let me write it right here. 04:24.380 --> 04:25.160 So. 04:26.330 --> 04:28.880 So this called present. 04:33.140 --> 04:34.220 Working. 04:39.070 --> 04:39.910 Directory. 04:46.970 --> 04:47.360 Here. 04:47.360 --> 04:52.580 As you can see, p w d means that present working directory. 04:52.580 --> 05:02.180 So if you write the D here and as you can see, we printed us the our working directory in our shell 05:02.180 --> 05:02.390 here. 05:02.390 --> 05:14.450 So if we go to user bin CD user bin or again CD bin here and whenever we write the p w d present working 05:14.450 --> 05:14.870 directory. 05:14.870 --> 05:18.260 And as you can see here, we printed our current working directory. 05:18.260 --> 05:23.600 As you can see, these are not the same because we changed our working directory. 05:24.110 --> 05:30.530 So you can move to any level within the entire Linux virtual directory structure from any level. 05:30.530 --> 05:39.140 Using the absolute directory reference, we can also go to, for example, CD actual let's clear the, 05:39.140 --> 05:41.720 we can also go to CD var log here. 05:41.720 --> 05:44.840 And as you can see here, we got to var log. 05:44.840 --> 05:52.650 So this changed here and whenever we write the CD and as you can see here, we are seeing our working 05:52.650 --> 05:53.400 directory now. 05:53.400 --> 05:58.950 So you can also quickly jump to your home directory from any level within the Linux virtual directory 05:58.950 --> 06:01.470 structure with just a simple CD command. 06:01.470 --> 06:05.100 And as you can see here we are in the home now. 06:05.100 --> 06:11.040 However, if you are just working with your own home directory structure, often using the absolute 06:11.040 --> 06:13.290 directory references can get tedious. 06:13.290 --> 06:20.700 So for example, if you are already in the directory of our home column, it seems somewhat cumbersome 06:20.700 --> 06:22.920 to have to type this command. 06:22.920 --> 06:31.920 So CD home Kali and after that documents here or Kali two downloads here and as you can see we got two 06:31.950 --> 06:36.130 downloads so you can just get to your documents directory. 06:36.150 --> 06:40.770 Fortunately, there is a simpler solution we can use the instead of using. 06:40.770 --> 06:43.530 So actually let me write that down here. 06:43.530 --> 06:50.400 So in this here, this whole lecture, we use the absolute absolute. 06:52.180 --> 06:53.160 Or actually we can. 06:53.170 --> 06:56.680 So we use the absolute path. 06:57.310 --> 06:59.560 Directory APD. 07:00.100 --> 07:03.320 But now we're going to use the relative directory. 07:03.340 --> 07:05.770 Relative directory here. 07:05.770 --> 07:09.190 So now in order to do that, this is just a simple here. 07:09.190 --> 07:15.810 So instead of writing CD home Kali Linux download, now we can just write here. 07:15.820 --> 07:17.590 Actually, let's go to our. 07:19.430 --> 07:21.920 Here's clear CD. 07:21.920 --> 07:23.540 So we are in the home directory. 07:23.890 --> 07:26.840 CD As you can see, we are in the home directory now. 07:27.350 --> 07:32.720 In order to go to downloads again, just right, it downloads and see the downloads. 07:32.720 --> 07:35.780 And as you can see here, we got into the downloads here. 07:35.780 --> 07:42.170 So relative directory references, lawsuit, a specific destination directory reference relative to 07:42.170 --> 07:43.490 your current location. 07:43.490 --> 07:48.890 So a relative directory reference doesn't start with the forward slash as you can see here. 07:49.700 --> 07:55.100 Instead, a relative directory reference starts with either a directory name, so if you are reversing 07:55.130 --> 08:01.040 to a directory under your current directory or a special character, for example, if you are in your 08:01.040 --> 08:08.720 home directory and want to move to your here downloads directory or downloads sub directory, you can 08:08.720 --> 08:12.860 use the CD command along with a relative directory reference. 08:12.860 --> 08:15.860 So here, let's actually go to a different here. 08:15.860 --> 08:18.200 So CD pictures. 08:18.230 --> 08:20.870 Oops, do do we have pictures here? 08:22.210 --> 08:22.810 Yeah. 08:23.890 --> 08:24.610 And as you can see. 08:24.610 --> 08:26.590 Yeah, see the pictures. 08:27.100 --> 08:31.900 And as you can see, we changed our directory to pictures and. 08:31.900 --> 08:32.300 Yeah. 08:32.330 --> 08:32.740 P.w.d.. 08:32.860 --> 08:35.620 And as you can see, we are in the pictures directory. 08:35.620 --> 08:44.350 So in this example I want to note that the no forward slashes, the no forward slashes was used. 08:44.350 --> 08:51.190 So instead of relative directory reference was used and preset, the work directory was changed from 08:51.190 --> 08:59.140 our home collie to home collie pictures with or downloads with less. 08:59.140 --> 09:01.350 Um with less typing. 09:01.360 --> 09:03.160 I'm waiting you in the next lecture.