WEBVTT 00:09.230 --> 00:11.620 Hello Friends will come back in this lesson. 00:11.630 --> 00:18.010 We're going to talk about the setting of you must value and also the concept of soft links and hard 00:18.010 --> 00:18.840 links. 00:19.160 --> 00:22.310 So let's see practically about this concept. 00:22.310 --> 00:25.230 One by one or get in the Linux environment. 00:25.250 --> 00:32.840 When we create any new file or directory and then that trick your file is get created by some default 00:33.140 --> 00:35.560 attributes or default permissions. 00:35.630 --> 00:38.480 So let's read the file here. 00:38.760 --> 00:44.720 Touch XTi the list views permissions again. 00:44.930 --> 00:52.310 Now here you can see this student or XTi file is created with write permission for user group and other 00:52.310 --> 00:53.250 users. 00:53.250 --> 00:57.560 So setting up you must Veliz means you can set your own permissions. 00:57.570 --> 00:58.320 OK. 00:58.370 --> 01:05.990 In the Linux environment for Windows users that create a new file then that final Firedrake is created 01:05.990 --> 01:12.260 with the word missions that you set and you can set those permissions with the help of you must come 01:12.260 --> 01:12.810 on. 01:13.080 --> 01:18.620 So to view the current in my settings Just type of mask. 01:18.890 --> 01:19.410 OK. 01:19.580 --> 01:22.730 And these are the current You must settings. 01:22.820 --> 01:30.470 So there is a rule to apply there you must searching for file and for folder or directory when you want 01:30.470 --> 01:33.900 to apply the settings for file. 01:33.950 --> 01:42.850 I mean suppose you want to set up reader permissions for all these user group and other user then what 01:42.860 --> 01:46.300 you need to do is you need to provide the value to too. 01:46.490 --> 01:54.530 So what I'm providing the value here who could do so so then you set the number or whatever number you 01:54.530 --> 01:55.370 set here. 01:55.430 --> 01:59.000 You can see the number here from 0 to 7. 01:59.030 --> 01:59.300 OK. 01:59.300 --> 02:01.820 You cannot set any number beyond that. 02:01.820 --> 02:07.720 And when you said any number then that number gets substracted from 6 6. 02:07.790 --> 02:16.460 In case of file and from 7 in case of folder and of after substracting or what remains and that value 02:16.640 --> 02:21.760 is applied as a permission on file or directly target. 02:21.830 --> 02:29.400 So when I said here you could go then it is applied for a user group and other users. 02:29.420 --> 02:34.370 So it's good substracted from file that is 6. 02:34.450 --> 02:41.050 And so when 6 minus 2 is equal to 4 then 4 means a real permission. 02:41.090 --> 02:45.110 OK so I'm going to apply the real permission for only here. 02:45.140 --> 02:47.760 So that is why I said this. 02:47.780 --> 02:50.710 You must set things so let's see then. 02:50.950 --> 02:59.040 Now create a new file here that's got DST and now it's permission. 02:59.270 --> 03:04.750 And here you can see the destock the file is created with read permission. 03:05.150 --> 03:12.210 When you create a directory directly with the US holds Steve. 03:12.740 --> 03:13.690 Yes. 03:14.360 --> 03:14.900 OK. 03:15.110 --> 03:21.130 Here you can see the directories get created with the read Exit couldn't read Exit get permission. 03:21.410 --> 03:26.770 OK not one point that you can set the exec permission for file. 03:26.990 --> 03:28.460 OK with you my settings. 03:28.490 --> 03:36.890 But you can't control the permission for directory venue or you want to set the most permission. 03:36.980 --> 03:41.930 Suppose you want to avoid the exit get permission for directory. 03:42.010 --> 03:47.870 Then you can simply set the values according to that means. 03:47.930 --> 03:51.080 Suppose I set the value here 0 0 1. 03:51.170 --> 03:52.810 Let's see what happens. 03:52.990 --> 03:59.590 And it's created directly in our last one. 03:59.630 --> 04:01.390 Now let's do the contents. 04:01.590 --> 04:01.850 OK. 04:01.850 --> 04:06.810 Now here you can see this one directory's get created there. 04:06.830 --> 04:10.710 It is not having execute permission for other users. 04:10.740 --> 04:13.860 OK because we said and no one at the end. 04:13.880 --> 04:16.020 So seven minus one is six. 04:16.070 --> 04:22.940 So six means there is only read and write permission because for permission there is number four and 04:22.940 --> 04:24.180 four write permission. 04:24.230 --> 04:26.740 That is number two so four plus six. 04:26.840 --> 04:30.170 That's why the permissions are applied. 04:30.290 --> 04:30.610 OK. 04:30.610 --> 04:31.770 In this way. 04:31.850 --> 04:34.590 So in this way you can sort of leave us values. 04:34.700 --> 04:37.180 Now let's talk about. 04:37.490 --> 04:43.200 What is softly a soft link is a so-called symbolic link or a symlink. 04:43.400 --> 04:49.170 And it is work or it work like a shortcut inside the Windows environment. 04:49.340 --> 04:55.490 OK suppose our file is present on the audio drive in Windows then we create a shortcut on desktop. 04:55.590 --> 05:00.770 Simply access that file very fast so softly. 05:00.890 --> 05:01.970 Work like that. 05:02.030 --> 05:07.230 So how to create a softly create a new file here. 05:08.280 --> 05:10.250 Just to gawk DST 05:14.570 --> 05:17.790 you know that some condense. 05:17.850 --> 05:20.410 This is the that's 05:28.760 --> 05:36.300 you know or will file this copy the studio is hearing these contents OK. 05:36.650 --> 05:39.290 So I hope to read the soft link for it. 05:39.300 --> 05:40.860 All shot good for it. 05:41.080 --> 05:45.720 So did I become more alone than yes. 05:45.810 --> 05:48.360 And then the source file. 05:48.540 --> 05:56.880 So spelling is this Who got the ax deal and the new soft monkey's soft. 05:56.880 --> 05:58.410 Got the XTi. 05:58.530 --> 05:59.190 OK. 05:59.490 --> 06:01.580 Now let's review. 06:01.830 --> 06:06.970 And here you can see these soft dark 60s the Shockley. 06:06.990 --> 06:13.360 And we just get created here and here you can see how the soft links are displayed in the Linux environment. 06:13.590 --> 06:14.120 OK. 06:14.420 --> 06:17.280 And these arrows pointing to the source file. 06:17.340 --> 06:17.830 OK. 06:17.880 --> 06:19.140 With the short link. 06:19.260 --> 06:22.410 So now we can't access the contents of this. 06:22.410 --> 06:24.910 You got the ASCII file of a soft link. 06:24.940 --> 06:29.980 So let's get sauf got the XTi OK. 06:30.240 --> 06:38.760 So now we are accessing the contents of this got the ex-US softly and just type here. 06:39.330 --> 06:45.240 So here let's observe the I know number OK here you can see the numbers. 06:45.270 --> 06:49.090 The numbers are the I know numbers in Linux environment. 06:49.260 --> 06:52.210 The files are recognizable bytes. 06:52.230 --> 06:53.220 I know the number. 06:53.280 --> 06:58.770 Not with the file name file names are for the convenience for the humans. 06:58.770 --> 06:59.170 OK. 06:59.310 --> 07:05.220 So here I know numbers are present and these are like a data structure. 07:05.220 --> 07:12.970 So let's observe the I know Number of this do not be XTi that is 1 3 3 6 9 5. 07:13.090 --> 07:21.720 And I know a number of soft topics that is 1 3 3 6 9 2 Sobota hiring different kind or get different 07:21.720 --> 07:22.610 final number. 07:22.710 --> 07:27.300 So what happens when I delete the source file this 07:30.190 --> 07:32.230 cased block 60. 07:32.370 --> 07:32.740 OK. 07:32.760 --> 07:37.990 Now let's take a look at this sort of topics. 07:38.290 --> 07:38.760 OK. 07:38.850 --> 07:41.650 Now it says no such file or that was present. 07:41.730 --> 07:49.840 That means when we delete the source file then we can be able to access the contents of the file why 07:49.920 --> 07:50.930 soft link. 07:51.030 --> 07:51.580 OK. 07:51.750 --> 07:55.170 Now we learn how to create a soft link or any file. 07:55.410 --> 08:00.420 So now I me show you how to create an hardlink. 08:00.420 --> 08:05.230 So hardlink is nothing but a new name for an existing file. 08:05.310 --> 08:06.240 OK. 08:06.330 --> 08:12.300 In case of hardlink when you create it then it is going to say why no numbers are good that the source 08:12.300 --> 08:13.440 file is heavy. 08:13.490 --> 08:15.020 Or let's create here. 08:15.270 --> 08:16.190 Hardly. 08:16.270 --> 08:16.860 Come on. 08:16.920 --> 08:17.260 OK. 08:17.280 --> 08:18.630 The same command is used. 08:18.630 --> 08:20.990 And here you need to provide the source file. 08:21.340 --> 08:24.670 Suppose I want to create an army for. 08:24.990 --> 08:25.950 OK. 08:26.160 --> 08:29.500 Let's create a new file here. 08:30.890 --> 08:32.400 STUDENT 2. 08:32.490 --> 08:34.500 Got it. 08:35.090 --> 08:35.360 Let's 08:38.440 --> 08:40.140 go. 08:40.220 --> 08:42.890 This is a class 08:48.980 --> 08:51.610 you know the contents 08:54.760 --> 08:57.860 only the contents are added in the file. 08:57.860 --> 09:02.000 Now let's get to Harlem third grader hulling long. 09:02.190 --> 09:12.450 And then the source file this student who got the XP and new name or the hardlink name so hard to know 09:12.480 --> 09:16.200 the extent now. 09:16.970 --> 09:17.880 OK. 09:18.040 --> 09:25.450 Here you can see how excited hardly is get created here for the white student who got 60. 09:25.510 --> 09:29.590 And you can see here a vote on having the same my number. 09:29.750 --> 09:30.260 OK. 09:30.550 --> 09:34.780 And let's access the contents of hardlink. 09:34.840 --> 09:38.010 So get off piste. 09:38.070 --> 09:38.460 OK. 09:38.480 --> 09:40.600 Both are having the same content. 09:40.810 --> 09:47.870 And when they remove the source file was filed in student 2.0. 09:48.060 --> 09:49.250 Exactly. 09:49.680 --> 09:50.430 OK. 09:50.430 --> 09:58.690 And now again the contents of hard luck OK the contents are still present there means we can't access 09:58.690 --> 10:01.830 the contents on removal of the source file. 10:02.010 --> 10:02.260 OK. 10:02.260 --> 10:07.820 In this way the hard line and soft lines are used in the Linux environment. 10:07.860 --> 10:08.360 OK. 10:08.600 --> 10:12.320 OK here I will show you a practical example of suckling. 10:12.400 --> 10:14.710 Let's get inside the room directly. 10:15.230 --> 10:18.900 And here you can see OK it is the image file. 10:18.940 --> 10:19.270 OK. 10:19.270 --> 10:20.980 And it is a soft link. 10:21.010 --> 10:26.880 I and I aren't even softening good image file of the Linux environment here. 10:27.010 --> 10:27.570 OK. 10:27.840 --> 10:30.730 This fear is soft links are actually used here. 10:30.870 --> 10:32.290 Soft links are present. 10:32.400 --> 10:32.850 OK. 10:32.950 --> 10:33.670 In the Linux.