1 00:00:06,540 --> 00:00:08,250 - [Instructor] In this segment, we're going to talk 2 00:00:08,250 --> 00:00:10,496 about and look at PowerShell. 3 00:00:10,496 --> 00:00:13,500 Now, PowerShell is a powerful, no pun intended, 4 00:00:13,500 --> 00:00:17,040 task automation and configuration management framework 5 00:00:17,040 --> 00:00:20,580 consisting of a command line shell and scripting language. 6 00:00:20,580 --> 00:00:23,550 And it's straightforward and easy to learn. 7 00:00:23,550 --> 00:00:25,620 Now, the quickest way to find PowerShell 8 00:00:25,620 --> 00:00:28,710 on a Windows device is to go right to the search bar 9 00:00:28,710 --> 00:00:32,160 and type PowerShell, and it will bring up the app. 10 00:00:32,160 --> 00:00:34,020 It's gonna give me an option of running 11 00:00:34,020 --> 00:00:37,290 as a currently logged in user or as the administrator. 12 00:00:37,290 --> 00:00:39,660 I'm gonna choose to run as the administrator. 13 00:00:39,660 --> 00:00:41,130 If I go down to my task bar, 14 00:00:41,130 --> 00:00:44,505 I'm gonna see the icon to open it up. 15 00:00:44,505 --> 00:00:45,930 That's going to bring me 16 00:00:45,930 --> 00:00:49,140 to the Windows PowerShell shell, if you will. 17 00:00:49,140 --> 00:00:51,210 Tells me I'm running as an administrator 18 00:00:51,210 --> 00:00:53,313 and I'm right here at the prompt. 19 00:00:54,270 --> 00:00:56,130 Now, compiled commands and PowerShell 20 00:00:56,130 --> 00:00:57,900 are called commandlets. 21 00:00:57,900 --> 00:00:59,333 Commandlet names have the form 22 00:00:59,333 --> 00:01:02,700 of the singular verb dash noun command 23 00:01:02,700 --> 00:01:06,240 to make them really easy to discover and to remember. 24 00:01:06,240 --> 00:01:08,400 So I wanna give you just some examples 25 00:01:08,400 --> 00:01:10,620 of how we interact with PowerShell. 26 00:01:10,620 --> 00:01:13,320 Some really simple examples to begin with. 27 00:01:13,320 --> 00:01:16,200 Let's say I wanna learn what processes are running. 28 00:01:16,200 --> 00:01:19,080 Remember, I'm gonna use the form verb noun. 29 00:01:19,080 --> 00:01:20,700 So the verb is get 30 00:01:20,700 --> 00:01:23,940 and the noun is gonna be process, get process, 31 00:01:23,940 --> 00:01:24,990 and that's gonna come back 32 00:01:24,990 --> 00:01:27,150 and show me all the processes that are running 33 00:01:27,150 --> 00:01:28,560 on this system. 34 00:01:28,560 --> 00:01:30,120 Maybe I wanna know what services. 35 00:01:30,120 --> 00:01:32,160 Again, verb dash noun. 36 00:01:32,160 --> 00:01:34,593 So get-service. 37 00:01:35,790 --> 00:01:38,280 There are all my running services. 38 00:01:38,280 --> 00:01:41,460 Well, I probably have a lot to learn about using PowerShell 39 00:01:41,460 --> 00:01:43,500 so I really wanna become familiar 40 00:01:43,500 --> 00:01:45,360 with the help functionality. 41 00:01:45,360 --> 00:01:47,040 So if I wanna learn about help, 42 00:01:47,040 --> 00:01:48,780 what do you think it's gonna be? 43 00:01:48,780 --> 00:01:52,350 Well, let's start with the verb get and then help. 44 00:01:52,350 --> 00:01:54,480 And that's gonna bring up information 45 00:01:54,480 --> 00:01:58,530 for me about how to use help within the PowerShell. 46 00:01:58,530 --> 00:02:01,440 So the entire PowerShell help system 47 00:02:01,440 --> 00:02:04,770 I'm gonna just use cls to clear the screen. 48 00:02:04,770 --> 00:02:08,760 Maybe I wanna get help about how I interact 49 00:02:08,760 --> 00:02:11,790 with commands that have the word "service" in it. 50 00:02:11,790 --> 00:02:16,710 Well get-help and then service. 51 00:02:16,710 --> 00:02:17,880 And that's gonna come back 52 00:02:17,880 --> 00:02:21,660 and tell me about all of the commandlets or functions 53 00:02:21,660 --> 00:02:24,240 that are associated with the term service. 54 00:02:24,240 --> 00:02:26,250 And it will give me a synopsis. 55 00:02:26,250 --> 00:02:28,890 If I wanna learn more about a particular one, 56 00:02:28,890 --> 00:02:29,850 let's say the first one, 57 00:02:29,850 --> 00:02:33,423 the list, get-service, well, get-help. 58 00:02:34,860 --> 00:02:37,170 And then what do you think comes next? 59 00:02:37,170 --> 00:02:39,063 Well, get-service. 60 00:02:40,200 --> 00:02:42,480 And that's going to give me specifics 61 00:02:42,480 --> 00:02:44,970 about how to use that command, the synopsis, 62 00:02:44,970 --> 00:02:49,893 the syntax, description, related links, and other remarks. 63 00:02:51,780 --> 00:02:54,510 Now there are an awful lot of commands 64 00:02:54,510 --> 00:02:55,950 that are at your fingertips. 65 00:02:55,950 --> 00:02:59,070 Well, really, we should call them commandlets and functions. 66 00:02:59,070 --> 00:03:00,870 So how do you find out what they are? 67 00:03:00,870 --> 00:03:02,280 Well, you know what? 68 00:03:02,280 --> 00:03:04,200 There's a commandlet for that. 69 00:03:04,200 --> 00:03:06,603 It's gonna be get-command. 70 00:03:07,590 --> 00:03:09,570 And what we see here is a list 71 00:03:09,570 --> 00:03:12,180 of all of the commands and functions that are available 72 00:03:12,180 --> 00:03:14,880 to us to use within PowerShell 73 00:03:14,880 --> 00:03:19,260 and obviously, it's a really, really extensive list. 74 00:03:19,260 --> 00:03:21,270 So I'm just gonna stop this list. 75 00:03:21,270 --> 00:03:23,910 I'm gonna hit Control + C, so we can continue on 76 00:03:23,910 --> 00:03:26,943 and I'll do cls again, just to clear the screen. 77 00:03:27,870 --> 00:03:28,800 So let's do more 78 00:03:28,800 --> 00:03:31,860 than just run a list of processes or services. 79 00:03:31,860 --> 00:03:33,870 Let's actually invoke some commands. 80 00:03:33,870 --> 00:03:35,940 So the first one I wanna show you 81 00:03:35,940 --> 00:03:39,700 and I'm gonna invoke-command, is that I wanna go out 82 00:03:40,740 --> 00:03:43,890 out to the event log, my system event log, 83 00:03:43,890 --> 00:03:47,070 and I wanna have displayed the last 50 entries, 84 00:03:47,070 --> 00:03:49,020 meaning the newest 50 entries. 85 00:03:49,020 --> 00:03:51,420 So I'm gonna say invoke-command. 86 00:03:51,420 --> 00:03:55,533 And the command I'm gonna invoke is ScriptBlock. 87 00:03:59,651 --> 00:04:03,203 And then I'm gonna put in some parameters, get-EventLog. 88 00:04:06,390 --> 00:04:09,120 And the one I wanna get is system. 89 00:04:09,120 --> 00:04:12,360 And I wanna get the newest 50 entries. 90 00:04:12,360 --> 00:04:16,353 So I'm gonna say newest 50 and close up those parameters. 91 00:04:17,520 --> 00:04:18,420 And there we go. 92 00:04:18,420 --> 00:04:22,473 That's the newest 50 entries in my event system log. 93 00:04:23,460 --> 00:04:25,830 Now I can query almost anything 94 00:04:25,830 --> 00:04:27,480 with PowerShell on my local system 95 00:04:27,480 --> 00:04:30,000 as well as other systems I'm connected to 96 00:04:30,000 --> 00:04:32,615 as long as I have the appropriate rights. 97 00:04:32,615 --> 00:04:34,950 But I can also go outside my network. 98 00:04:34,950 --> 00:04:37,470 I can go out to the web and query the web. 99 00:04:37,470 --> 00:04:39,510 I'm gonna do another invoke command. 100 00:04:39,510 --> 00:04:42,630 This time, I'm gonna go out to a Microsoft page 101 00:04:42,630 --> 00:04:45,990 and I wanna discover all the links on that page. 102 00:04:45,990 --> 00:04:49,137 So I'm gonna say Invoke-WebRequest 103 00:04:55,427 --> 00:05:00,427 and I am gonna go out to https://docs.microsoft.com. 104 00:05:06,690 --> 00:05:08,340 And I wanna get information 105 00:05:08,340 --> 00:05:10,770 about all the links that are on that page 106 00:05:10,770 --> 00:05:12,633 and what their reference is. 107 00:05:15,900 --> 00:05:18,060 And what just got returned to us 108 00:05:18,060 --> 00:05:21,540 is all the links that are embedded on that page 109 00:05:21,540 --> 00:05:25,803 both within the site and external to the site. 110 00:05:28,200 --> 00:05:31,260 You know, these are just some really simple examples. 111 00:05:31,260 --> 00:05:33,870 You know, you can use each commandlet separately 112 00:05:33,870 --> 00:05:35,910 but the power of PowerShell 113 00:05:35,910 --> 00:05:39,540 is realized when you combine these commandlets 114 00:05:39,540 --> 00:05:44,540 to perform complex tasks or to automate repetitive tasks. 115 00:05:44,820 --> 00:05:47,850 So I really, really wanna encourage you 116 00:05:47,850 --> 00:05:49,860 to get to know PowerShell. 117 00:05:49,860 --> 00:05:52,590 And there are so many resources available to you out there. 118 00:05:52,590 --> 00:05:54,900 There are open source resources. 119 00:05:54,900 --> 00:05:58,080 There's tons and tons of books that have been written. 120 00:05:58,080 --> 00:06:01,530 There's great help screens embedded in PowerShell. 121 00:06:01,530 --> 00:06:04,890 You know, getting to know PowerShell will make your job 122 00:06:04,890 --> 00:06:07,530 a lot easier and you're just gonna be amazed 123 00:06:07,530 --> 00:06:09,570 at all the things that you can do. 124 00:06:09,570 --> 00:06:13,650 So get to know PowerShell, you know, really start using it. 125 00:06:13,650 --> 00:06:15,813 And that my friends, is a closer look.