WEBVTT 00:08.620 --> 00:14.640 Hello will come back in this lesson we're going to learn how to share grueling tasks with cron jobs. 00:14.760 --> 00:17.120 OK so what is wrong job. 00:17.410 --> 00:24.190 It is in command line utility which is used to set up your tasks to be run at a particular date and 00:24.190 --> 00:25.120 time. 00:25.150 --> 00:31.270 So what are the benefits the benefits are like those you do need to go to a server and exactly the same 00:31.280 --> 00:36.250 common or performing some tasks you just need to set those Come on. 00:36.250 --> 00:37.630 Here with dustier to learn. 00:37.630 --> 00:44.710 And those comments will be executed at a particular time like if you want to back up your important 00:44.710 --> 00:46.190 files and folders. 00:46.240 --> 00:52.610 You can set up that task to be run every day or in a month or in a week. 00:53.290 --> 00:58.810 Or you can also set up the task to scanning was asking for viruses or that kind of thing. 00:59.020 --> 01:06.280 So you can set up the cron job to secure your system by scanning it at regular interval. 01:06.430 --> 01:07.130 OK. 01:07.180 --> 01:14.350 And interval of a day or so of before actually performing the practical with cron jobs. 01:14.350 --> 01:15.700 Let's see how it works. 01:15.700 --> 01:17.220 So there is a syntax. 01:17.470 --> 01:24.730 There are five stars in the cron job searching and here at the right side you need to set up the score 01:24.730 --> 01:26.620 come on that you want to execute. 01:26.800 --> 01:31.520 Let's see what each stat represents the first three presidents minutes. 01:31.690 --> 01:36.560 You can set the number of minute after which you want your task to be executed. 01:36.750 --> 01:37.210 OK. 01:37.330 --> 01:40.620 You can't set the minutes from 0 to 59. 01:40.720 --> 01:41.130 OK. 01:41.230 --> 01:44.220 Because a single hour in 16 minutes. 01:44.320 --> 01:47.360 So here you can set from zero to 59. 01:47.410 --> 01:49.500 The next step represents our. 01:49.540 --> 01:52.440 So our day consists of going to four hour. 01:52.560 --> 01:53.020 OK. 01:53.020 --> 01:55.920 Our clock is consisting of 24 hours. 01:56.050 --> 02:01.360 So you can sit here numbers from zero to 23 zero minutes. 02:01.460 --> 02:05.410 Well AM it walks like a 24 hour clock. 02:05.550 --> 02:13.990 So at which time you want to execute your task you can set up that number here according to your needs. 02:14.190 --> 02:14.480 OK. 02:14.500 --> 02:22.180 Suppose you want exactly what you are task or come on after 12:30 or so how you need to said that you 02:22.180 --> 02:25.410 need to send the hour star. 02:25.770 --> 02:28.350 And the minute star do 30. 02:28.360 --> 02:34.900 So what they were sent here and they I that will get executed at 12:30 p.m. OK. 02:35.500 --> 02:39.110 The next presents day of month in a month. 02:39.160 --> 02:41.590 There are a maximum of 31 days. 02:41.590 --> 02:47.380 So you can set the number from 1 to 31 and what they were number is said here. 02:47.730 --> 02:54.710 That combined will get executed and that the donkey and the next represents man. 02:54.850 --> 02:56.360 So there are amounts. 02:56.400 --> 02:58.870 So when you consider the number from one. 02:58.960 --> 03:01.650 Well OK one wins in January. 03:01.800 --> 03:02.270 OK. 03:02.440 --> 03:09.180 So you can see the numbers if you want to sit or execute your task that particular month. 03:09.910 --> 03:12.430 And the last one is day of week. 03:12.610 --> 03:12.940 OK. 03:12.980 --> 03:19.890 So zero and seven means Sunday and one means Monday or Tuesday and so on. 03:20.170 --> 03:25.800 So if you want good around your task that particular day of the week then you can't sit there calling 03:25.870 --> 03:27.740 to hear that number. 03:27.880 --> 03:31.490 So there is one thing that I want to mention here. 03:31.710 --> 03:34.750 Venu said the starter. 03:34.820 --> 03:41.860 Suppose you said the minutes to start not from zero to 15 and would set it to start as it did then the 03:41.860 --> 03:48.510 task order as you said here on the right side will be executed every minute of every minute. 03:48.700 --> 03:49.240 OK. 03:49.360 --> 03:55.300 The same logic is applied for every starter when you don't set it to particular day of month or month 03:55.300 --> 04:04.780 or day of recall hour that that means the task will be executed OK for every month the day of month 04:04.870 --> 04:06.280 hour and minutes. 04:06.520 --> 04:07.120 OK. 04:07.120 --> 04:09.210 So in this way These are works. 04:09.250 --> 04:17.750 So let's see practically a whole new set of grown ups who set up the con jobs are there is a common 04:17.870 --> 04:20.490 core has grown up. 04:20.740 --> 04:21.310 OK. 04:21.490 --> 04:26.820 And Nicholas pro-white hyphen e ave provide hope. 04:27.010 --> 04:31.710 Then it will start you are across jobs in the mall. 04:31.960 --> 04:37.130 When if you want to or list of jobs then type hyphen. 04:37.380 --> 04:41.330 And if you want to remove any cron job then type Ifan are OK. 04:41.330 --> 04:43.930 This way you can use the switches. 04:44.260 --> 04:45.130 OK. 04:45.130 --> 04:50.430 There are a few commands like the start restart or stop the cron jobs. 04:50.500 --> 04:59.070 So if you want to start or see the status then just type service cron status. 04:59.440 --> 05:03.170 And here you can see the cross-overs is running in this way. 05:03.190 --> 05:11.670 You can see the status or static college or just type here. 05:11.740 --> 05:15.180 Select deleter and attender. 05:15.180 --> 05:21.780 So when you type or grandpap hyphen at first time then you will see the output like this. 05:21.900 --> 05:22.640 OK. 05:22.800 --> 05:25.630 This is asking you to choose the leader forward. 05:25.650 --> 05:27.190 Oh come on Delphi. 05:27.400 --> 05:27.920 OK. 05:28.110 --> 05:35.970 So I want to select here four here because he represents the maker and number Gouri presence Nano is. 05:36.310 --> 05:39.110 So the answer is simple for some users. 05:39.150 --> 05:43.490 You can choose it according to a choice and go ahead. 05:43.650 --> 05:53.040 OK so you create a job or two should do the job just kind of crunch time for me. 05:53.330 --> 05:53.770 OK. 05:53.820 --> 06:01.920 And I want to set up the cron job for taking the back off of the EDC directory OK that we have said 06:01.920 --> 06:03.610 in the last lesson. 06:03.810 --> 06:09.680 So because the DC needs global privilege so type your pseudo cross-tab the 06:13.840 --> 06:18.850 OK so let's do that job here. 06:18.910 --> 06:23.380 So I want who are the bad guys every minute. 06:23.380 --> 06:25.660 So I'm going to set here start. 06:28.720 --> 06:31.820 So let's do the five stars here. 06:32.630 --> 06:35.380 And our job is to get the back up. 06:35.400 --> 06:45.540 So provide the command are we get them here provide the filename I want it who did at some point on 06:45.780 --> 06:51.620 our said and here the that you want to back up here. 06:51.630 --> 06:54.710 Pro-white I fancy Zed. 06:54.910 --> 06:55.650 Yes. 06:55.900 --> 06:57.090 OK. 06:57.480 --> 06:58.880 And yes. 06:59.130 --> 07:00.350 Right now. 07:00.950 --> 07:01.760 OK. 07:01.810 --> 07:03.680 Let's move inside group three. 07:03.820 --> 07:04.230 OK. 07:04.310 --> 07:09.000 Here there is no file present with a double dot dot dot. 07:09.040 --> 07:10.440 So that for one minute. 07:10.450 --> 07:12.020 And let's see what happens. 07:18.660 --> 07:26.010 See again hogi here you can see after one minute exampled Akbar God did their files get created in this 07:26.010 --> 07:32.050 way you can set up Dikran jobs who take the back of all you can't perform any task that you want to 07:32.060 --> 07:33.700 get. 07:33.720 --> 07:38.350 This is the one way for setting up a cron job. 07:38.460 --> 07:40.290 I want to set it for 07:43.690 --> 07:45.340 let's see here. 07:45.340 --> 07:51.000 First of all let's just get inside through and delete this file. 07:51.380 --> 07:58.680 Pseudo r.m the blue dot dot dot. 08:00.770 --> 08:04.210 And I've got this right now the current time. 08:04.330 --> 08:04.980 OK. 08:05.140 --> 08:07.940 Here you can see the current Burmese of 13. 08:08.130 --> 08:08.570 OK. 08:08.590 --> 08:12.900 Forking means it's 14:00 Woopie about 11 minutes. 08:13.150 --> 08:18.530 So let's say the job here for us supports 14 billion. 08:18.660 --> 08:19.400 OK. 08:19.420 --> 08:23.430 So let's see how you set it up by changing our fee. 08:23.680 --> 08:25.950 OK so yesterday on to I'll be 08:30.450 --> 08:40.600 let's get insert more OK remove this command line and I want to know what task after 30 minutes after 08:41.970 --> 08:43.410 mine 30 minutes. 08:43.450 --> 08:44.300 OK. 08:45.100 --> 08:47.360 I'll write it down. 08:48.530 --> 08:49.770 OK. 08:50.390 --> 08:53.340 Now we need to check this after one minute. 08:53.340 --> 08:55.950 Let's see here what is your time. 08:58.440 --> 08:58.870 OK. 08:58.900 --> 09:01.110 These 14 13. 09:01.810 --> 09:03.090 OK let's get it do 09:06.020 --> 09:21.510 let's say who reads all the writing don't forget there is no files in this directory. 09:21.720 --> 09:23.110 Let's see the date. 09:23.450 --> 09:25.660 So it's 40 30. 09:25.700 --> 09:28.010 So let's see what happens. 09:28.650 --> 09:29.240 Alice 09:36.540 --> 09:38.150 bouquet now of her. 09:38.160 --> 09:46.410 Oh one minute you need to check the status of these tasks in order. 09:46.730 --> 09:54.180 We have set it to 15 minutes at 2pm and 15 minutes and then see your desk. 09:54.350 --> 09:55.130 OK it's done. 09:55.130 --> 09:55.940 And let's see. 09:55.970 --> 10:00.970 And here you can see in the root directory example dot dot dot does help file is created OK. 10:00.980 --> 10:07.180 Of this 14 hour and 15 minutes means 14 minutes or time OK. 10:07.190 --> 10:07.930 14 hours. 10:07.930 --> 10:12.420 It's not exactly around to say You stupid 15 minutes. 10:12.500 --> 10:13.580 Get in this way. 10:13.670 --> 10:20.420 You can share task on the basis of one Veeck day of the point. 10:20.510 --> 10:21.150 OK. 10:21.410 --> 10:24.410 So in this production those can be used. 10:25.010 --> 10:28.910 So there is another way of settling for us. 10:28.940 --> 10:30.050 Let's get inside 10:32.390 --> 10:36.370 D.C. and here you can see here. 10:36.440 --> 10:38.610 These are the directory's corndog. 10:38.760 --> 10:44.210 OK where you can go right on in these directories you can write your own script. 10:44.320 --> 10:44.850 OK. 10:45.050 --> 10:52.040 And you can run those clip on a monthly basis or hourly basis or daily basis you can you just need to 10:52.040 --> 10:58.370 write down your own script and so that script in this directory and that scoop will really get executed 10:58.490 --> 11:05.220 on the basis of where you were receiving minutes on the daily hourly order basis. 11:05.370 --> 11:05.840 OK. 11:06.080 --> 11:07.840 This is a robot. 11:08.410 --> 11:17.060 And the last way we learn is important and very useful in this way you can set up Dikran jobs and lower 11:17.060 --> 11:22.810 down the burden on your mind to perform specific tasks again and again.