1 00:00:00,240 --> 00:00:05,970 Now that we've talked about what the command line is and why it's important and useful Let's actually 2 00:00:05,970 --> 00:00:07,140 learn how to use it. 3 00:00:07,170 --> 00:00:12,810 So I'm going to start by introducing a few of the most important commands which have to do with navigating 4 00:00:12,870 --> 00:00:18,240 files and folders structures and to do that we need to have a few files that we can interact with in 5 00:00:18,420 --> 00:00:20,300 folders to navigate through. 6 00:00:20,310 --> 00:00:27,330 So I'm going to create a new folder here in cloud 9 and go over to my workspace here and right click 7 00:00:28,410 --> 00:00:34,860 and click on new folder and that creates a new folder instead of my Web Dev Bootcamp which is the name 8 00:00:34,860 --> 00:00:35,940 of my workspace. 9 00:00:35,940 --> 00:00:39,800 Everything we do will be a folder instead of Dev Bootcamp. 10 00:00:39,900 --> 00:00:45,490 So I'm going to make a new folder here and just call it intro to command line. 11 00:00:46,080 --> 00:00:50,860 And this is where it will make some of our files and practice some of the command line basics. 12 00:00:51,330 --> 00:00:52,580 So I'll make that. 13 00:00:52,710 --> 00:00:59,820 And then inside of Intro to command line I mean right click on that and click new file and we'll just 14 00:00:59,820 --> 00:01:06,060 call this message and we'll make it a t t file just text. 15 00:01:06,160 --> 00:01:07,770 Just like that. 16 00:01:08,130 --> 00:01:12,570 And then I'm going to double click on that file and just add a quick message in there and it can be 17 00:01:12,570 --> 00:01:13,570 anything you want. 18 00:01:13,830 --> 00:01:16,550 Hello from the message. 19 00:01:16,680 --> 00:01:20,910 60 file and we'll save it. 20 00:01:20,970 --> 00:01:26,130 You can see that it's unsaved because I get this little circle right there and when it's saved you'll 21 00:01:26,130 --> 00:01:28,520 see that it goes away to save it though. 22 00:01:28,530 --> 00:01:33,950 I can either do file save or it can use the shortcut that it shows next to it. 23 00:01:33,960 --> 00:01:35,790 So for me that's command s. 24 00:01:36,060 --> 00:01:41,640 So I'll do that now command as you can see that that little circle that was there is gone now. 25 00:01:41,760 --> 00:01:49,050 So I've saved the file now that I have a folder and a single file inside of it that I created with my 26 00:01:49,050 --> 00:01:53,810 mouse I right clicking which I did not use a command line to do any of that. 27 00:01:53,820 --> 00:01:56,790 Now that we have a folder and a file to work with. 28 00:01:56,910 --> 00:02:02,520 Let's talk about the command line and how we can use a command line to interact with those directories 29 00:02:02,730 --> 00:02:04,110 and the file. 30 00:02:04,110 --> 00:02:06,250 So we're going to go to the command line here. 31 00:02:06,330 --> 00:02:10,030 The first thing I want to demonstrate is a command called l s. 32 00:02:10,200 --> 00:02:16,230 So we type the letters L N S No spaces just ls and hit enter. 33 00:02:16,230 --> 00:02:22,920 And what it shows us is all of the contents of the current folder that were inside of and the current 34 00:02:22,920 --> 00:02:26,100 folder I'm inside of is called workspace. 35 00:02:26,100 --> 00:02:31,210 You can see here workspace is a little weird but think of it it's the top level. 36 00:02:31,290 --> 00:02:39,060 It's the highest up we can go in our entire workspace is this workspace folder and it shows me this 37 00:02:39,060 --> 00:02:42,170 little message right here says I'm in workspace. 38 00:02:42,840 --> 00:02:50,640 So LS stands for list and it just shows me all the files and folders of my current folder and I'm currently 39 00:02:50,820 --> 00:02:51,610 right here. 40 00:02:51,810 --> 00:02:56,220 And so all that I can see is intro to commendably so I'll type it one more time. 41 00:02:56,250 --> 00:03:01,170 LS And I get a folder here called the intro to command line. 42 00:03:01,710 --> 00:03:07,630 The next important command is CD and what CD lets this do is change directories. 43 00:03:08,040 --> 00:03:16,530 It's how I could go inside of Intro to command line to UCD we type the letters C and D space and then 44 00:03:16,560 --> 00:03:20,710 the name of the folder or directory that we want to change into. 45 00:03:20,730 --> 00:03:27,030 So we have to tell it the name of the folder so we can hit LS again and you'll see that intro to command 46 00:03:27,030 --> 00:03:29,100 line is now spelled correctly. 47 00:03:29,100 --> 00:03:34,320 Whereas before when I hit LS It was showing me the old file name or the old directory name. 48 00:03:34,350 --> 00:03:35,390 And then I changed it. 49 00:03:35,490 --> 00:03:40,270 So I typed LS again and this just shows me what it is now. 50 00:03:40,290 --> 00:03:49,200 So to change directory I need to type CD and then intro to command line make sure it's spelled correctly 51 00:03:49,470 --> 00:03:51,420 and is capitalized the same way. 52 00:03:51,420 --> 00:03:56,660 And then I'll hit enter and you'll see that my prompt changes. 53 00:03:56,760 --> 00:04:03,060 Now it shows that instead of workspace slash intro to command line instead of Intro to command line 54 00:04:03,210 --> 00:04:09,410 if I want to list the files and directories I just type LS again and hit enter. 55 00:04:09,550 --> 00:04:14,850 And now you can see that I'm listing all the files and there's only one message dot TXI. 56 00:04:15,840 --> 00:04:23,430 And I can click on Message that text here and click open and it opens it up here for me and it's already 57 00:04:23,430 --> 00:04:30,570 open so if I close out of it and now a click on Message that text and click Open it opens it for me 58 00:04:30,600 --> 00:04:36,580 and I can edit it if I want to add in goodbye and save. 59 00:04:36,900 --> 00:04:38,590 And we can close out. 60 00:04:39,140 --> 00:04:43,520 Now let's create a nother file inside of Intro to command line. 61 00:04:44,010 --> 00:04:45,740 And I'm just going to go over here again. 62 00:04:45,810 --> 00:04:54,240 And right click and go to new file and the file I'm going to create is called Hello that age DML and 63 00:04:54,240 --> 00:04:55,960 hit enter. 64 00:04:55,980 --> 00:05:03,720 Now if I come here and I type LS You can see that I have a haloed that h t m l and I'm going to open 65 00:05:03,720 --> 00:05:07,000 that in my editor and I'll add in some simple h t m l 66 00:05:09,810 --> 00:05:15,120 just like that and save and close out of it. 67 00:05:15,190 --> 00:05:22,020 So if I hit LS again I still have two files if I go over here you can see the exact same files and structure 68 00:05:22,020 --> 00:05:22,410 . 69 00:05:22,420 --> 00:05:28,990 Basically it's just another interface here I'm doing it through text and the command line here I'm viewing 70 00:05:28,990 --> 00:05:38,080 things as a folder structure similar to the Finder window on a Mac to go backwards a folder or up one 71 00:05:38,070 --> 00:05:38,690 level. 72 00:05:38,700 --> 00:05:47,080 So I'm inside of Intro to command line and if I wanted to then be here I can use CD again but I don't 73 00:05:47,070 --> 00:05:55,650 have a folder named to type I type CD space dot dot and you can see when I do that I was in Intro to 74 00:05:55,650 --> 00:05:56,890 command line. 75 00:05:56,920 --> 00:06:03,090 Now I'm just in workspace so CD that takes me back one level and if I type. 76 00:06:03,100 --> 00:06:11,160 LS Now you can see I'm back here where the only folder is intro to command line so I can CD back in 77 00:06:11,400 --> 00:06:14,800 CD enter to command line type. 78 00:06:14,800 --> 00:06:17,530 LS You can see the two files there. 79 00:06:17,640 --> 00:06:19,050 Hello to each team now. 80 00:06:19,070 --> 00:06:20,730 Message TXI. 81 00:06:21,150 --> 00:06:23,080 Let's create a new folder. 82 00:06:23,400 --> 00:06:28,140 So right click new folder and we'll just call it colors. 83 00:06:28,300 --> 00:06:31,680 So a folder called colors and hit enter. 84 00:06:31,690 --> 00:06:36,720 Now if I hit LS here you can see I have message that takes t. 85 00:06:36,780 --> 00:06:37,440 Hello Daddy. 86 00:06:37,440 --> 00:06:40,630 Tim L and a directory called colors. 87 00:06:40,890 --> 00:06:46,690 And notice how it changes the color of a directory it makes it blue and adds the slash afterwards so 88 00:06:46,690 --> 00:06:50,840 that we can tell if something is a folder or if it's a file. 89 00:06:51,150 --> 00:06:57,440 And then I could also see into colors just like that and hit enter. 90 00:06:57,490 --> 00:07:01,870 And if I type LS There's nothing here because there are no files. 91 00:07:01,870 --> 00:07:09,120 So one more time I'll make a new file right quick new file and we'll call this red dot TXI. 92 00:07:09,630 --> 00:07:19,560 And now if I type LS You can see I get red x t and then I can back out one level C-D dot dot and I'm 93 00:07:19,560 --> 00:07:23,350 now in Intro to command line right here. 94 00:07:23,400 --> 00:07:25,020 So I was right here. 95 00:07:25,020 --> 00:07:26,320 Now I'm here. 96 00:07:26,910 --> 00:07:29,680 So if I type LS I see the colors directory. 97 00:07:29,680 --> 00:07:32,310 Hello H shemale message that text. 98 00:07:32,520 --> 00:07:40,740 Now if I do see the dot dot one more time I'm now back in the workspace where if I type LS all I see 99 00:07:40,750 --> 00:07:42,480 is intro to command line. 100 00:07:42,490 --> 00:07:47,440 I might be thinking that it's a pain to have to type intro to command line if I want to change directory 101 00:07:47,450 --> 00:07:48,690 and I have to type the whole thing. 102 00:07:48,760 --> 00:07:53,140 CD intro to command line just like that. 103 00:07:53,470 --> 00:07:55,110 But there's actually a much quicker way. 104 00:07:55,120 --> 00:08:02,670 So if I cd back out and I type LS It's still there I can type CD and start to type the name and then 105 00:08:02,680 --> 00:08:06,500 hit tab and then automatically completes it for me. 106 00:08:06,570 --> 00:08:08,560 So that makes it really fast. 107 00:08:08,560 --> 00:08:16,030 So for instance if I wanted to CD into intro to command line I can just type CDI and hit tab and then 108 00:08:16,020 --> 00:08:22,660 if I wanted to go into colors I can just see the colors or CDC and hit tab and the auto completes for 109 00:08:22,650 --> 00:08:23,370 me. 110 00:08:23,880 --> 00:08:29,430 So it is a little faster than it might seem upfront and once you master this once you get comfortable 111 00:08:29,440 --> 00:08:32,470 with the commands you can do them very quickly. 112 00:08:32,470 --> 00:08:37,560 I know you may not believe me right now because it's definitely slower especially the pace that we're 113 00:08:37,570 --> 00:08:42,480 going at but when you start out it always feels slower and it always is slower. 114 00:08:42,490 --> 00:08:47,550 My students always complain without fail in the first few weeks that the command line is never going 115 00:08:47,560 --> 00:08:48,780 to be useful for them. 116 00:08:48,820 --> 00:08:50,620 It will never become second nature. 117 00:08:50,910 --> 00:08:55,400 And then after using it for a few weeks it really clicks and they never go back. 118 00:08:55,440 --> 00:09:00,930 Even the people who felt the strongest about not using it after I had forced them to use it and I did 119 00:09:00,930 --> 00:09:05,600 some exercises and they saw everyone else using it just after a few weeks. 120 00:09:05,670 --> 00:09:07,080 Everyone's a convert. 121 00:09:07,600 --> 00:09:12,810 There's one thing I didn't show which is that you can also do ls on a folder that you're not inside 122 00:09:12,820 --> 00:09:13,600 of. 123 00:09:13,600 --> 00:09:18,940 So I'm currently inside of Intro to command line if I wanted to see what's inside of colors I can type 124 00:09:18,940 --> 00:09:18,970 . 125 00:09:18,980 --> 00:09:24,990 LS colors and it shows me that red dot TXI t is instead of colors. 126 00:09:25,360 --> 00:09:33,400 And then there's CD change directory and I can do cd space and the name of a directory like colors and 127 00:09:33,390 --> 00:09:38,440 you can see my prompt changes and if I type LS here I get red dot T. 128 00:09:38,860 --> 00:09:43,080 And I can do C.D. dot dot to go back one level. 129 00:09:43,090 --> 00:09:46,930 So now I'm on intro to command line one more time. 130 00:09:46,920 --> 00:09:52,290 And now I'm on workspace and the next video we're going to see how we can create files and directories 131 00:09:52,330 --> 00:09:58,590 from the command line rather than having to right click over here and click on new folder or a new file 132 00:09:58,660 --> 00:10:00,520 will do it from the command line.