1 00:00:04,410 --> 00:00:11,010 I have just explained you how you could enable a SSH server on Linux computer if it is not enabled and 2 00:00:11,010 --> 00:00:14,790 connect to Linux server remotely via secure protocol. 3 00:00:14,880 --> 00:00:15,570 Ssh. 4 00:00:15,600 --> 00:00:19,110 And actually here I am currently connected to via SSH. 5 00:00:19,140 --> 00:00:26,160 You see this information here in description of this step to our docker ubuntu container and I have 6 00:00:26,160 --> 00:00:28,230 just connected as root user. 7 00:00:28,260 --> 00:00:34,560 All right, now let me show you two additional utilities called curl and wget. 8 00:00:34,800 --> 00:00:39,150 Let's first type curl and here I see command not found. 9 00:00:39,150 --> 00:00:45,060 Let's quickly install it using apt get apt get install curl. 10 00:00:47,210 --> 00:00:47,950 Installing? 11 00:00:47,960 --> 00:00:48,620 Yes. 12 00:00:50,350 --> 00:00:53,200 And now let's clear terminal and enter key. 13 00:00:53,770 --> 00:00:57,970 And here as argument, let's supply host name of one of the servers. 14 00:00:57,970 --> 00:01:00,490 For example, let's use again google.com. 15 00:01:01,120 --> 00:01:09,550 And here I actually get HTML page of google.com and I get actually response that google.com page was 16 00:01:09,550 --> 00:01:10,040 moved. 17 00:01:10,060 --> 00:01:16,540 I get response 301 moved and here is location of the server I need to connect to. 18 00:01:16,570 --> 00:01:20,820 You see that prefix three was appended to google.com name. 19 00:01:20,830 --> 00:01:26,980 Let's use curl command, but now with host name three ws google.com like this. 20 00:01:27,580 --> 00:01:32,920 And now I get actually HTML page supplied by google.com server. 21 00:01:32,950 --> 00:01:41,020 You see that closing tag is HTML and with utility you are able to get actually content of the web page 22 00:01:41,020 --> 00:01:42,250 from the internet. 23 00:01:42,700 --> 00:01:46,920 Now let me show you one more utility called wget. 24 00:01:46,960 --> 00:01:47,830 This one. 25 00:01:47,830 --> 00:01:55,160 And with this utility, you could download any file from Internet, for example, archive or some image 26 00:01:55,160 --> 00:01:57,710 or some text file, anything you want. 27 00:01:57,920 --> 00:02:02,450 And let's, for example, download the image from the Google.com website. 28 00:02:02,780 --> 00:02:07,700 Let's open up a web browser and open up new tab and enter here Google.com. 29 00:02:09,150 --> 00:02:11,460 And here, let's inspect this page. 30 00:02:11,460 --> 00:02:13,620 Right button, click inspect. 31 00:02:15,150 --> 00:02:19,290 Next, please click on this selector element icon. 32 00:02:19,290 --> 00:02:20,070 This one. 33 00:02:21,040 --> 00:02:23,680 And click afterwards on this image. 34 00:02:24,780 --> 00:02:30,390 And here, if you'll remove a bit this part, you'll see actual location of the image. 35 00:02:30,390 --> 00:02:32,460 Let me make it a bit larger. 36 00:02:33,810 --> 00:02:34,740 Like so. 37 00:02:34,740 --> 00:02:36,480 And here is this location. 38 00:02:36,630 --> 00:02:38,130 It is PNG file. 39 00:02:38,130 --> 00:02:45,660 Let me copy this path src and here let's append it to this hostname like this. 40 00:02:45,690 --> 00:02:48,330 It is entire path for this icon. 41 00:02:48,330 --> 00:02:52,560 If I press enter here in web browser, I'll see this icon right here. 42 00:02:52,800 --> 00:02:57,270 Let's now use this path in wget command. 43 00:02:57,300 --> 00:02:58,260 I'll copy it. 44 00:02:58,260 --> 00:03:07,200 And here enter w get like this and paste copied URL again, this URL for specific image that is served 45 00:03:07,200 --> 00:03:09,000 by google.com server. 46 00:03:09,120 --> 00:03:16,020 Let's press enter and you'll see that this image was just downloaded to this computer. 47 00:03:16,170 --> 00:03:21,050 And if I enter ls, I'll see this image in the home directory. 48 00:03:21,120 --> 00:03:23,730 It is current directory for this root user. 49 00:03:23,760 --> 00:03:24,930 Google logo color. 50 00:03:24,930 --> 00:03:28,290 And here is actually the entire name of this PNG image. 51 00:03:29,550 --> 00:03:35,370 That's how you could use w get command in order to download some files from internet. 52 00:03:35,640 --> 00:03:43,830 Let me quickly get back to command and show you how you could save page to the file and actually you 53 00:03:43,830 --> 00:03:44,760 know how to do that. 54 00:03:44,760 --> 00:03:52,320 And please pause the video now and try to save web page served by three ws google.com to the file. 55 00:03:56,190 --> 00:03:57,790 All right, let's do that together. 56 00:03:57,810 --> 00:04:01,710 You have seen that with command and argument. 57 00:04:01,710 --> 00:04:06,720 Three ws google.com result will be printed actually to the terminal. 58 00:04:06,720 --> 00:04:13,230 And the reason for that is that by default stdout data stream is sent to the terminal. 59 00:04:13,650 --> 00:04:19,290 And if you want to redirect it to the file you could use greater than sign operator. 60 00:04:19,440 --> 00:04:24,390 You remember that from the previous lectures and here we could give name to the file. 61 00:04:24,390 --> 00:04:26,550 Let's say google dot HTML. 62 00:04:27,560 --> 00:04:32,260 And now I see that page was received and saved to this file. 63 00:04:32,270 --> 00:04:34,850 I don't see this output here in the terminal. 64 00:04:34,850 --> 00:04:40,730 And if I list files here now, I will see additional file google dot HTML. 65 00:04:41,600 --> 00:04:43,970 And if I read contents of this file. 66 00:04:43,970 --> 00:04:46,430 Sorry it wasn't auto completed for some reason. 67 00:04:46,430 --> 00:04:50,570 Google dot HTML and now I see contents of this file. 68 00:04:50,780 --> 00:04:55,250 That's how you could use wget and C utilities. 69 00:04:55,280 --> 00:04:57,080 That's all for this quick lecture. 70 00:04:57,080 --> 00:05:03,560 And in the next one I want to talk about environment variables and I'll show you how to get currently 71 00:05:03,560 --> 00:05:05,840 set environment variables for current session. 72 00:05:05,840 --> 00:05:11,540 And also I'll explain you how to create new environment variables and use them afterwards. 73 00:05:11,590 --> 00:05:13,240 I'll see you guys in the next lecture. 74 00:05:13,250 --> 00:05:13,880 Bye bye.