WEBVTT 00:00.680 --> 00:07.280 Okay, now it is time to go and create this application or improve this application and make it a little 00:07.280 --> 00:08.280 more secure. 00:08.320 --> 00:16.200 Okay, so here we have in the documentation we have subprocess dot run and we can use a list here. 00:16.240 --> 00:16.720 Okay. 00:16.760 --> 00:20.680 And then we can separate each command by command. 00:20.720 --> 00:21.640 Okay. 00:21.680 --> 00:26.080 So not like these that we use all in one line. 00:26.120 --> 00:26.400 Okay. 00:26.440 --> 00:31.240 We can use each command as an element of a list. 00:31.280 --> 00:32.920 It is more secure. 00:32.960 --> 00:34.400 So let's jump right in here. 00:34.560 --> 00:34.960 Okay. 00:36.200 --> 00:39.680 Uh, here you see we have we are using interface. 00:39.720 --> 00:40.120 Okay. 00:41.920 --> 00:42.880 Interface. 00:42.880 --> 00:52.600 And also if config and also interface and also down all this stuff has one element. 00:52.760 --> 00:53.160 Okay. 00:54.200 --> 00:56.960 Now let's go and change it okay. 00:57.640 --> 01:00.040 We could change it to something like this. 01:00.040 --> 01:01.680 Let me remove this part. 01:01.720 --> 01:02.120 Okay. 01:02.630 --> 01:04.910 Now I'm going to change it to a list. 01:06.990 --> 01:09.630 And I'm writing here. 01:10.710 --> 01:11.190 Okay. 01:11.590 --> 01:13.790 Now it is changed to a list. 01:13.790 --> 01:19.190 But I have to change this to an element. 01:19.230 --> 01:20.030 Okay. 01:20.030 --> 01:22.390 So we don't need this plus icon here. 01:22.430 --> 01:23.230 Okay. 01:23.230 --> 01:23.870 That is it. 01:23.910 --> 01:24.750 And also. 01:27.550 --> 01:28.310 This one. 01:28.550 --> 01:31.190 And also where was the other one. 01:31.230 --> 01:31.510 Okay. 01:31.510 --> 01:37.830 Let's put it here and put it here so later we can remove it okay. 01:38.070 --> 01:38.310 Now. 01:43.870 --> 01:44.870 Or not like this. 01:44.870 --> 01:46.390 Let me change it in another way. 01:46.430 --> 01:46.830 Okay. 01:47.830 --> 01:50.150 How can I select multiple line okay. 01:50.190 --> 01:56.750 I keep or I press alt key and then I click here and then click here. 01:57.070 --> 01:59.230 Now I get this one. 02:00.550 --> 02:01.870 Okay now I have it. 02:03.230 --> 02:04.350 And again here. 02:06.790 --> 02:09.430 Okay, now. 02:09.470 --> 02:10.190 Very good. 02:10.350 --> 02:13.950 Now, it's better to remove this part again from here. 02:14.470 --> 02:16.350 And also from here. 02:18.110 --> 02:18.510 Okay. 02:19.390 --> 02:22.190 So use a camera here. 02:23.230 --> 02:25.030 And also from here. 02:27.150 --> 02:27.910 Right in here. 02:29.710 --> 02:29.910 Okay. 02:29.910 --> 02:31.350 There is the other one that is here. 02:31.390 --> 02:31.870 Okay. 02:39.750 --> 02:40.710 Okay. 02:40.710 --> 02:41.350 Perfect. 02:41.510 --> 02:42.750 Now let me save it. 02:42.950 --> 02:43.750 Okay. 02:43.790 --> 02:46.870 I think there is no more thing. 02:47.110 --> 02:55.670 Okay, let's go and use a clear command here and re-execute the program. 02:59.390 --> 02:59.990 Okay. 03:00.150 --> 03:01.830 We have an error here. 03:01.870 --> 03:02.710 What is that? 03:05.630 --> 03:08.420 I think I haven't used a camera here. 03:08.580 --> 03:10.060 On which line? 03:10.060 --> 03:10.780 Line six. 03:11.900 --> 03:14.180 That is here and here. 03:15.820 --> 03:16.580 Very good. 03:16.700 --> 03:19.860 Now save it again and go back here and hit enter. 03:20.060 --> 03:21.100 So what is the interface? 03:21.140 --> 03:32.420 It is ETH zero and the Mac address is going to be 001122 and three three and four four again. 03:32.460 --> 03:33.460 Let's go with four four. 03:33.500 --> 03:34.540 Hit enter. 03:34.580 --> 03:36.660 It says Mac and change. 03:36.700 --> 03:37.420 Okay. 03:39.420 --> 03:43.780 With no such file or directory. 03:43.940 --> 03:46.540 If on tick. 03:47.700 --> 03:50.180 Why is this file not found? 03:50.940 --> 03:51.860 What does that mean? 03:55.820 --> 03:59.900 Okay, Mac, change line seven in module. 03:59.940 --> 04:00.820 Okay. 04:02.740 --> 04:05.340 Ifconfig interface down. 04:06.660 --> 04:07.020 Okay. 04:07.020 --> 04:08.420 We have a lot of space here. 04:08.420 --> 04:09.730 Let me go and. 04:12.810 --> 04:13.410 Fix this. 04:13.410 --> 04:13.770 Okay. 04:14.450 --> 04:16.530 Let me remove these spaces from here. 04:18.010 --> 04:18.810 And also. 04:23.970 --> 04:26.370 I think we don't need these spaces anymore. 04:33.130 --> 04:33.610 Okay. 04:33.650 --> 04:36.490 Also here, you see, we have another thing. 04:36.530 --> 04:36.930 Okay. 04:37.730 --> 04:42.450 And this both it is two command and I use them as one command. 04:42.890 --> 04:44.610 Maybe this is the problem. 04:44.650 --> 04:45.290 Okay. 04:45.330 --> 04:48.250 Let's handle that as well okay. 04:48.290 --> 04:50.330 Use a separator. 04:51.490 --> 04:52.330 Separate them okay. 04:52.330 --> 04:53.810 Now it looks good. 04:53.850 --> 04:55.810 Let's go and execute this again okay. 04:55.850 --> 04:59.730 Here you learn how to handle some error okay. 04:59.770 --> 05:01.530 Both zero. 05:01.930 --> 05:03.210 And what is the Mac address. 05:03.250 --> 05:09.530 It is zero zero again 0011223344. 05:10.290 --> 05:11.410 And again, four four. 05:11.450 --> 05:12.050 Hit enter. 05:12.330 --> 05:14.490 Now there is no problem, I think. 05:14.810 --> 05:16.250 And it is changed. 05:16.290 --> 05:16.930 Very good. 05:16.970 --> 05:18.090 Let's use ifconfig. 05:19.130 --> 05:20.890 Now it is changed to this this thing. 05:20.930 --> 05:21.770 Okay. 05:21.810 --> 05:23.290 Let's use clear. 05:23.290 --> 05:25.530 And this time let's hijack this. 05:28.450 --> 05:31.650 Okay I'm going to give the eth0. 05:32.530 --> 05:33.290 Okay. 05:33.290 --> 05:36.730 And then I'm going to use for example LSE. 05:39.130 --> 05:40.650 And then hit enter. 05:40.650 --> 05:41.530 Which one. 05:41.530 --> 05:41.890 Okay. 05:42.890 --> 05:44.090 Something and hit enter. 05:44.530 --> 05:45.570 Now you see that. 05:48.130 --> 05:52.490 Error while getting interface like no such devices. 05:52.530 --> 05:53.250 Okay. 05:53.290 --> 05:57.690 Now you see that it it is checking this only as one command. 05:57.730 --> 05:59.810 It is not using this okay. 05:59.850 --> 06:01.650 As a separate command. 06:02.010 --> 06:08.610 Now here you learn how to solve this hijacking problem. 06:08.650 --> 06:10.010 Very good. 06:10.050 --> 06:10.890 Let's go and see. 06:11.010 --> 06:12.970 How can we improve this a little more?