1 00:00:00,330 --> 00:00:03,390 OK, now it's time to talk about fight and command monitoring. 2 00:00:04,520 --> 00:00:11,540 We already saw the comment command, and we used the Dutch five option to soar because by default, 3 00:00:12,380 --> 00:00:15,890 it will show the last 10 lines. 4 00:00:16,040 --> 00:00:18,890 Now that's five, it will show the last five lines. 5 00:00:19,130 --> 00:00:24,140 Now using dash up option, this will open the file and will keep monitoring it. 6 00:00:24,470 --> 00:00:33,500 OK, so for example, if you want to check for access logs, so VAR log apache2 and access, by the 7 00:00:33,500 --> 00:00:35,370 way, I don't have a you here. 8 00:00:35,750 --> 00:00:38,170 And I think for now, let's open it. 9 00:00:38,180 --> 00:00:38,720 No problem. 10 00:00:38,960 --> 00:00:43,400 So systemctl status apache2, you can see it is running. 11 00:00:43,730 --> 00:00:50,210 So now let's bring the local IP like this. 12 00:00:50,960 --> 00:00:58,070 Or actually, let's use the curve command, whatever for me for now as TB and put this one, as you 13 00:00:58,070 --> 00:00:58,550 can see. 14 00:01:00,280 --> 00:01:01,210 You can see that. 15 00:01:01,240 --> 00:01:01,870 Here it is. 16 00:01:02,260 --> 00:01:03,280 Now if I. 17 00:01:04,330 --> 00:01:06,240 Check again, the VAR log. 18 00:01:06,670 --> 00:01:09,100 You can see that we should have actually see. 19 00:01:12,470 --> 00:01:14,280 Look, you can see that. 20 00:01:14,300 --> 00:01:14,870 Here it is. 21 00:01:14,900 --> 00:01:15,350 OK. 22 00:01:16,190 --> 00:01:17,840 No British intervention in Darfur. 23 00:01:17,880 --> 00:01:23,030 Now let's from here right-click split terminal vertically. 24 00:01:23,060 --> 00:01:25,310 OK, now here on the second one. 25 00:01:26,280 --> 00:01:29,090 Let's use again the kill command. 26 00:01:29,190 --> 00:01:29,640 OK. 27 00:01:30,000 --> 00:01:33,600 So kill actually is just like using the browser. 28 00:01:33,720 --> 00:01:41,340 It will, as you can see here, if I Mankell or see you are allowed to transfer a URL, so so to transfer 29 00:01:41,340 --> 00:01:48,470 data using a specific protocol or to access specific and check a specific connection to the website, 30 00:01:48,480 --> 00:01:54,360 so can actually be one two seven two zero zero one, which is the local host. 31 00:01:54,780 --> 00:01:55,830 Press enter. 32 00:01:55,950 --> 00:01:58,230 You can see that we have another access. 33 00:01:58,470 --> 00:02:03,360 So this is why using the dash options, using the tin, as you can see. 34 00:02:03,780 --> 00:02:06,360 OK, now we have another command called Watch. 35 00:02:06,600 --> 00:02:07,080 OK. 36 00:02:07,320 --> 00:02:10,470 And this watch to see the number of fights. 37 00:02:10,470 --> 00:02:18,540 So you can see that, for example, if I run this tail, but without using the dash of option like this, 38 00:02:18,930 --> 00:02:23,340 I want to keep running it to check if there is a problem or not. 39 00:02:23,780 --> 00:02:31,080 Is there any axis or suspicious access now when instead of doing that over and over, we can put before 40 00:02:31,080 --> 00:02:31,730 it there? 41 00:02:31,740 --> 00:02:36,390 Watch Dash and and one and press enter. 42 00:02:36,930 --> 00:02:37,410 This is. 43 00:02:38,610 --> 00:02:43,350 This will keep updated then when and which means the number OK, number of seconds. 44 00:02:43,620 --> 00:02:48,330 This will keep updating this command every one second. 45 00:02:48,720 --> 00:02:56,310 So instead of typing it over and over, over and over, just watch Dash and the number of is seconds 46 00:02:56,310 --> 00:02:59,880 is one and keep it as it will keep popping. 47 00:03:00,330 --> 00:03:05,940 OK, now in our case for the tail, actually, tail is better because tail is really tiny, after all, 48 00:03:06,330 --> 00:03:09,840 but their watch this is used with another scenario. 49 00:03:10,500 --> 00:03:15,210 For example, you are writing to a file, you are doing some stuff. 50 00:03:15,220 --> 00:03:15,800 Whatever. 51 00:03:15,810 --> 00:03:18,890 OK, well, it depends on you what you prefer. 52 00:03:19,410 --> 00:03:21,090 Use it as you want. 53 00:03:21,600 --> 00:03:21,830 OK.