1 00:00:06,540 --> 00:00:07,373 - All right. 2 00:00:07,373 --> 00:00:09,150 Let me show you pinfo. 3 00:00:09,150 --> 00:00:10,080 Now, what is the thing? 4 00:00:10,080 --> 00:00:12,360 The thing is that some commands like man ls, 5 00:00:12,360 --> 00:00:13,650 you go all the way down, 6 00:00:13,650 --> 00:00:16,743 by the way, uppercase D brings you all the way down, 7 00:00:17,640 --> 00:00:19,080 there you will see the SEE ALSO. 8 00:00:19,080 --> 00:00:20,220 And in this SEE ALSO, 9 00:00:20,220 --> 00:00:23,250 you can see full documentation is on this website 10 00:00:23,250 --> 00:00:26,970 and locally available via info. 11 00:00:26,970 --> 00:00:28,650 Wow, that's a long command, 12 00:00:28,650 --> 00:00:32,250 info '(core utils) ls invocation'. 13 00:00:32,250 --> 00:00:34,260 Now, what is this info system? 14 00:00:34,260 --> 00:00:38,213 This info system was created somewhere in the 1980s. 15 00:00:39,150 --> 00:00:43,530 And it makes you think a little bit of a webpages. 16 00:00:43,530 --> 00:00:45,250 It's showing you a hierarchy 17 00:00:46,110 --> 00:00:49,650 that has child items and parent items, 18 00:00:49,650 --> 00:00:51,903 and much more complicated stuff. 19 00:00:53,040 --> 00:00:53,940 And honestly, 20 00:00:53,940 --> 00:00:57,900 info is not the most user-friendly stuff that you can use. 21 00:00:57,900 --> 00:01:01,110 And that is why, personally, I am never using it. 22 00:01:01,110 --> 00:01:04,110 But as man pages are telling you about it, 23 00:01:04,110 --> 00:01:07,800 at least you should have an impression of what is going on. 24 00:01:07,800 --> 00:01:11,970 So I am going to change the command, 25 00:01:11,970 --> 00:01:13,413 and I'm making it pinfo. 26 00:01:14,519 --> 00:01:17,010 pinfo is a little bit more convenient 27 00:01:17,010 --> 00:01:22,010 because pinfo will show you like a text based browser. 28 00:01:22,230 --> 00:01:25,320 And in the text based browser, you see hyperlinks. 29 00:01:25,320 --> 00:01:27,690 Do you see what's happening in the lines at the bottom? 30 00:01:27,690 --> 00:01:29,790 I'm using my mouse key right now. 31 00:01:29,790 --> 00:01:31,110 And by using the mouse key 32 00:01:31,110 --> 00:01:35,220 I am capable of selecting additional options. 33 00:01:35,220 --> 00:01:36,930 So this is really the manual 34 00:01:36,930 --> 00:01:40,560 and I'm going to select which files are used. 35 00:01:40,560 --> 00:01:44,670 While I do so, you should also have a look at the top line. 36 00:01:44,670 --> 00:01:47,070 The top line, that's the line that is marked in blue, 37 00:01:47,070 --> 00:01:50,970 where right now we can see file, coreutils.info. 38 00:01:50,970 --> 00:01:52,710 Node, that's a current topic, 39 00:01:52,710 --> 00:01:55,290 and the current topic is ls invocation. 40 00:01:55,290 --> 00:01:58,680 Next, dir invocation, and Up, Directory listing. 41 00:01:58,680 --> 00:02:02,700 Now I'm selecting this, which files are used. 42 00:02:02,700 --> 00:02:05,220 And if you look at the top line right now, 43 00:02:05,220 --> 00:02:08,070 you can see the Node is which files are used. 44 00:02:08,070 --> 00:02:10,950 And Up, is ls invocation. 45 00:02:10,950 --> 00:02:13,497 If you press U, for up, then you go up. 46 00:02:13,497 --> 00:02:15,450 And you can do the same thing again. 47 00:02:15,450 --> 00:02:16,980 So sorting up, there we go. 48 00:02:16,980 --> 00:02:20,010 This is the help about sorting output. 49 00:02:20,010 --> 00:02:22,800 And there you can see there's note on file stamps. 50 00:02:22,800 --> 00:02:25,860 I press Enter, and suddenly I'm in the file stamps. 51 00:02:25,860 --> 00:02:29,880 And, well, this is how you easily get lost 52 00:02:29,880 --> 00:02:31,653 in the jungle of pinfo. 53 00:02:32,550 --> 00:02:34,650 The nice thing about pinfo 54 00:02:34,650 --> 00:02:37,900 is that frequently it has good documentation. 55 00:02:37,900 --> 00:02:39,270 There is nothing wrong 56 00:02:39,270 --> 00:02:41,670 with the quality of the documentation, 57 00:02:41,670 --> 00:02:44,340 but what makes pinfo a little bit hard 58 00:02:44,340 --> 00:02:47,310 is that it is like a web interface 59 00:02:47,310 --> 00:02:51,630 that is captured in a text based utility. 60 00:02:51,630 --> 00:02:53,430 So probably the best thing 61 00:02:53,430 --> 00:02:56,430 when you see in man pages, 62 00:02:56,430 --> 00:03:01,050 full documentation at some website or available locally, 63 00:03:01,050 --> 00:03:04,680 well, I would advise you just go to the website. 64 00:03:04,680 --> 00:03:07,320 The website contains the same information, 65 00:03:07,320 --> 00:03:11,820 and is providing the information in a readable way. 66 00:03:11,820 --> 00:03:13,140 You wanna check it out? 67 00:03:13,140 --> 00:03:14,520 Let's go check it out. 68 00:03:14,520 --> 00:03:17,790 I'm right clicking, and I'm using Copy Link, 69 00:03:17,790 --> 00:03:21,300 and going to the graphical browser. 70 00:03:21,300 --> 00:03:24,960 And then we are going to check it out in the browser. 71 00:03:24,960 --> 00:03:26,730 So here we are in the browser. 72 00:03:26,730 --> 00:03:31,730 And I am using Paste and Go, and what do we get? 73 00:03:32,490 --> 00:03:34,290 Hey, doesn't this look familiar? 74 00:03:34,290 --> 00:03:39,240 As you can see, this is what you see in pinfo as well. 75 00:03:39,240 --> 00:03:43,830 Good old '90, '91 internet based text browsing 76 00:03:43,830 --> 00:03:47,160 but probably you are more at ease in this interface 77 00:03:47,160 --> 00:03:49,020 than in the text based interface. 78 00:03:49,020 --> 00:03:51,970 Well, in the end, it's up to you, but this is how it works.