1 00:00:00,960 --> 00:00:06,540 Second option how to assign a variable is by using a raid command. 2 00:00:06,810 --> 00:00:16,500 We are using grid command space and then the name of our variable using grid command is an interactive 3 00:00:16,500 --> 00:00:18,960 way how to set a variable. 4 00:00:18,960 --> 00:00:25,320 Classic example of read the command can be read in the age from user's input. 5 00:00:25,320 --> 00:00:31,780 Then we can display Redbirds by prepending assign let's write some script to practice this option. 6 00:00:34,030 --> 00:00:37,560 I will create a file called read s h 7 00:00:40,990 --> 00:00:42,210 on the first line. 8 00:00:42,220 --> 00:00:44,620 Don't forget to start with shebeen. 9 00:00:47,070 --> 00:00:48,570 Bin bash 10 00:00:51,510 --> 00:00:57,140 on the next line will ask users to put their names here. 11 00:00:57,220 --> 00:01:05,800 And it means that echo command won't add new line so we can continue on the same line now by typing 12 00:01:05,840 --> 00:01:06,780 good he'd name. 13 00:01:06,780 --> 00:01:12,240 We are storing user input to a variable called name. 14 00:01:12,330 --> 00:01:16,530 Also read age in the same way. 15 00:01:16,530 --> 00:01:19,370 Read age. 16 00:01:19,740 --> 00:01:25,550 Now we can print our variables to see the results. 17 00:01:26,560 --> 00:01:29,190 école employs statistic 18 00:01:35,180 --> 00:01:38,860 and let's bring some information about name 19 00:01:43,360 --> 00:01:45,750 Eco Age. 20 00:01:46,170 --> 00:01:48,210 Do not assign 21 00:01:50,910 --> 00:01:51,300 age 22 00:01:54,590 --> 00:01:56,590 fit and save your Edita Or 23 00:02:01,630 --> 00:02:07,740 And we also need to change permission in order to Rander script. 24 00:02:08,020 --> 00:02:11,040 So change mode a plus x. 25 00:02:11,090 --> 00:02:11,820 Read S H 26 00:02:14,690 --> 00:02:20,880 and now we can see that we have run permissions so we can run the script 27 00:02:23,470 --> 00:02:25,130 so we are named John. 28 00:02:25,150 --> 00:02:26,720 Age 50. 29 00:02:27,130 --> 00:02:30,600 Yeah and voila we see the results works perfectly. 30 00:02:34,070 --> 00:02:40,960 I will clear the screen and create new script called read to. 31 00:02:41,080 --> 00:02:47,010 As I age first line is dedicated to siobhán 32 00:02:50,750 --> 00:02:59,300 bit mesh on the next line we'll use it month with parameter b. 33 00:02:59,330 --> 00:03:03,730 This allows us to print some message and read the user's input. 34 00:03:03,740 --> 00:03:12,230 Basically it is equal and that it commands first part its message then a space and then the second part 35 00:03:12,650 --> 00:03:18,890 variable name where we want to store user input on the next line. 36 00:03:18,890 --> 00:03:28,100 I also add another parameters as this means that user cannot see on the screen what is typing this behavior 37 00:03:28,130 --> 00:03:31,500 is usually used when we want to read someone password. 38 00:03:31,820 --> 00:03:37,760 But in our case we just want to hide user age from being displayed on the screen when the script reads 39 00:03:37,760 --> 00:03:40,740 it will print. 40 00:03:40,770 --> 00:03:43,490 Do variables values in equal command. 41 00:03:46,070 --> 00:03:47,370 Age or age 42 00:03:52,590 --> 00:04:02,920 and now save the file and it and we need to go around with permissions to script. 43 00:04:02,920 --> 00:04:03,880 Now we can that it 44 00:04:10,370 --> 00:04:12,190 name is John. 45 00:04:12,380 --> 00:04:13,570 Age is 50. 46 00:04:13,790 --> 00:04:14,690 I'm typing it. 47 00:04:14,690 --> 00:04:18,320 But on the screen you cannot see it. 48 00:04:18,530 --> 00:04:23,770 It works great but our output is displayed on the same time as age city. 49 00:04:23,810 --> 00:04:26,420 So I am going to correct it. 50 00:04:31,070 --> 00:04:36,990 And I will just add new took command before printing the variables values. 51 00:04:40,230 --> 00:04:43,580 So save the file and running again. 52 00:04:44,190 --> 00:04:49,910 Name John H 50. 53 00:04:50,760 --> 00:04:52,620 Yeah and it works perfectly. 54 00:04:54,820 --> 00:05:01,390 Using grid command we can also read from files that say we want to start into a variable the content 55 00:05:01,420 --> 00:05:06,410 of UTC hostname file which is in my case you want to 16. 56 00:05:06,640 --> 00:05:12,730 I will create a file read from file as age 57 00:05:16,160 --> 00:05:19,130 and as you will I will start with siobhán 58 00:05:22,820 --> 00:05:23,870 bin bash 59 00:05:26,590 --> 00:05:29,020 on the next line right. 60 00:05:29,160 --> 00:05:37,200 I read hostname then let's of Dentyne which means that the variable from big file and then the file 61 00:05:37,200 --> 00:05:37,630 name 62 00:05:40,350 --> 00:05:43,820 on the next line will print the variable value. 63 00:05:51,930 --> 00:06:00,280 Echo hostname Dallara hostname. 64 00:06:00,380 --> 00:06:04,550 Now safe and create your editor. 65 00:06:06,040 --> 00:06:07,100 Change permissions 66 00:06:11,110 --> 00:06:13,770 and verandahs script to see the hostname file 67 00:06:19,740 --> 00:06:20,860 great Valks. 68 00:06:20,880 --> 00:06:21,230 Well.