1 00:00:00,000 --> 00:00:01,890 [No audio] 2 00:00:01,890 --> 00:00:06,330 What is Linux? So of course, we are going to learn 3 00:00:06,330 --> 00:00:08,760 Linux, but you do want to know what exactly Linux 4 00:00:08,940 --> 00:00:12,420 is? Linux is an operating system. It's just like 5 00:00:12,420 --> 00:00:15,000 any other operating system. For example, Microsoft 6 00:00:15,000 --> 00:00:20,490 has Windows. Apple has Mac, Sun which is now owned 7 00:00:20,490 --> 00:00:23,850 by Oracle, they have Solaris running on Spark 8 00:00:24,090 --> 00:00:28,890 hardware. So Linux is an operating system, which 9 00:00:28,890 --> 00:00:32,340 sits in the middle of your hardware and the users. 10 00:00:32,490 --> 00:00:35,550 And the users are the ones who run the 11 00:00:35,550 --> 00:00:39,810 applications. So it's like a middleman or a bridge 12 00:00:39,840 --> 00:00:43,410 that takes the commands from users and translate 13 00:00:43,410 --> 00:00:46,890 them to hardware. So look at this picture. So you 14 00:00:46,890 --> 00:00:50,550 see a computer, right? So if without an operating 15 00:00:50,550 --> 00:00:53,430 system, this computer is considered like a dumb 16 00:00:53,430 --> 00:00:56,160 terminal, it doesn't do anything. So how does it 17 00:00:56,160 --> 00:01:00,690 work? So we have this terminal, which is of course 18 00:01:00,690 --> 00:01:03,960 a piece of brick, you open the tray of that 19 00:01:03,960 --> 00:01:09,150 computer, you insert your CD or DVD and that CD or 20 00:01:09,150 --> 00:01:13,050 DVD has the operating system image sitting on it, 21 00:01:13,320 --> 00:01:17,040 whether it's Windows, or Linux, or whichever 22 00:01:17,280 --> 00:01:20,100 operating system that you are installing. So you 23 00:01:20,130 --> 00:01:24,000 boot your computer from that operating system. So 24 00:01:24,000 --> 00:01:26,340 once you're booting it up, it goes through the 25 00:01:26,370 --> 00:01:29,730 installation process. That installation process is 26 00:01:29,730 --> 00:01:32,040 going to ask you a bunch of questions like how do 27 00:01:32,040 --> 00:01:34,440 you want the operating system to be configured? 28 00:01:34,710 --> 00:01:38,130 How do you want your disk partition? How do you 29 00:01:38,130 --> 00:01:41,100 want how many users you want to have installed and 30 00:01:41,100 --> 00:01:46,770 so on. So once the installation is done, then at 31 00:01:46,770 --> 00:01:48,720 the end of the installation, it's going to ask you 32 00:01:48,720 --> 00:01:51,270 to reboot, you reboot the computer, and it comes up 33 00:01:51,300 --> 00:01:53,910 to the welcome screen. And it'll say welcome to 34 00:01:53,910 --> 00:01:56,850 Linux, or welcome to Windows or whichever 35 00:01:56,880 --> 00:01:59,790 operating system that you're installing. So then 36 00:01:59,790 --> 00:02:03,000 you could attach external devices to it for 37 00:02:03,000 --> 00:02:05,730 example, you could attach keyboard to it, you 38 00:02:05,730 --> 00:02:09,930 could attach mouse to it. So, you use these mouse 39 00:02:09,930 --> 00:02:15,690 and keyboards, you type a certain command, certain 40 00:02:16,020 --> 00:02:19,230 you use applications and type them and then you 41 00:02:19,230 --> 00:02:22,110 send it to your operating system. Then your 42 00:02:22,110 --> 00:02:24,540 operating system takes those commands and 43 00:02:24,540 --> 00:02:27,570 forward it to other hardware or other system 44 00:02:27,810 --> 00:02:30,420 peripherals. So some of them are for example, we 45 00:02:30,420 --> 00:02:33,180 have printer. So if you are running an 46 00:02:33,180 --> 00:02:35,580 application, for example, you're, running Microsoft 47 00:02:35,580 --> 00:02:38,880 Word, you type it in with your keyboard, and then 48 00:02:38,880 --> 00:02:41,460 you want to print that document right. So the 49 00:02:41,460 --> 00:02:44,130 operating system will take that document and send 50 00:02:44,130 --> 00:02:47,190 it to your printer and your printer will spit out 51 00:02:47,370 --> 00:02:50,220 the document that you want to print. Or if you're 52 00:02:50,220 --> 00:02:52,290 running other programs, for example, you are 53 00:02:52,290 --> 00:02:55,950 online, you're checking your email or you are 54 00:02:56,670 --> 00:03:00,720 running some online program or even games. So you 55 00:03:00,780 --> 00:03:04,080 are using your keyboard or your mouse, you are 56 00:03:04,080 --> 00:03:07,230 communicating with your operating system and the 57 00:03:07,230 --> 00:03:09,540 heart operating system communicates with your 58 00:03:09,540 --> 00:03:12,510 hardware and that's how it communicates to other 59 00:03:12,510 --> 00:03:13,980 devices on the network. 60 00:03:13,980 --> 00:03:15,157 [No audio]