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LPI Linux LPIC-1 101 and CompTIA Linux+

Perform Basic File Editing Operations Using vi

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LPIC1 & CompTIA Linux+ Intro

Hardware Settings

Boot the System

Change Runlevels and Reboot or Shutdown the System

Design Hard Disk Layout

Install a Boot Manager

Manage Shared Libraries

Debian Package Management

RPM & YUM Package Management

Work on the Command Line

Process Text Streams Using Filters

Perform Basic File Management

Use Streams, Pipes, and Redirects

Create, Monitor, and Kill Processes

Process Priorities

Search Text Files with Regular Expressions

Perform Basic File Editing Operations Using vi

00:00:00 - Welcome to Nugget 103.8 where we're learning
00:00:04 - basic file editing with the text editor "vi". This section,
00:00:10 - this nugget, we're going to learn about vi which is
00:00:15 - by far my absolute favorite of all text editors. I'm going to put a smiley face
00:00:20 - here, and by the end of this your geek cred is going to
00:00:23 - go way up because vi is by far the geekiest way. Well,
00:00:28 - one of the geekiest ways anyway to edit text. I'm so glad that this is
00:00:31 - one of the requirements for the CompTIA and LPIC exam because,
00:00:35 - yeah, you're going to be really happy that you learned vi.
00:00:38 - So let's get right down to it. Let's get to a command line.
00:00:43 - Okay, first things first, we are here at the command line and in
00:00:47 - the folder I have a file called file.txt. Now, it looks
00:00:51 - like this. So this is the file that we have. It's just a text file.
00:00:56 - Now, in order to open it with vi, the text editor, you type
00:01:00 - vi and then the name of the file. So vi file.txt
00:01:03 - and it opens it up. Now, vi, if you thought regular expressions
00:01:08 - were confusing, I have to confess. At first vi is going to
00:01:11 - drive you crazy. But it really is worth the effort to learn because
00:01:16 - it's extremely fast and your fingers don't have to go very far
00:01:19 - from the home row to do work. So it's worth the effort. Just
00:01:23 - trust me. So we start here. Vi has two basic modes. There's command
00:01:28 - mode which is what we're in right now. I can't actually edit
00:01:31 - the text here. I can't actually insert text or add text here. If
00:01:35 - I type, it's not going to work. This is the command mode. It means
00:01:38 - that we send commands to vi to manipulate the text. The other
00:01:42 - mode is called insert mode, and you can edit or enter insert
00:01:46 - mode by pressing one of a few keys. I will put us in insert
00:01:52 - mode, and then we can start typing things like The, The Today
00:01:57 - is the first day of the rest of your life, and we've inserted that.
00:02:00 - So we're in insert mode. And then to get back into the command
00:02:04 - mode, you press escape. And then I am in command mode. And I
00:02:09 - know because I can't type any of the, I just can't type words. If
00:02:13 - I start typing words, they're going to be commands. So those
00:02:16 - are the two things. There's command mode and there is insert mode. Now, you
00:02:21 - can also kind of say, there is another mode called execute mode
00:02:25 - which is where you tell it things, but I just consider that
00:02:27 - part of command mode where we are right now, alright.
00:02:30 - So you can't really tell a difference except that we're
00:02:34 - in insert mode now because I pressed I, and if I press escape,
00:02:38 - we are in command mode. Now, to get around the file, probably
00:02:44 - arrow keys will work. If you're in command mode, it's very
00:02:47 - likely that arrow keys will let you go up, down, left, right. But on the LPIC and the
00:02:53 - CompTIA requirements it specifically mentions the old school
00:02:58 - way of getting around vi, and those are using the keys
00:03:03 - h, j, k and l. Now, if that sounds confusing, you just have to trust me
00:03:08 - that it's not that bad. Now, if you look down at your keyboard, you'll
00:03:12 - see the h key
00:03:13 - of those four keys, the h key is on the left, and that's how
00:03:17 - you go left. So if I hit h, it goes to the left until it can no longer
00:03:22 - go left. And then on the other end of those four keys is l.
00:03:26 - Press l, tap, tap, tap, tap, tap, it goes right. Again, this is in
00:03:31 - command mode. It's going right and left using h to
00:03:35 - go left and l to go right.
00:03:39 - Now, the letters may not make sense, but at least if you look at those
00:03:42 - four keys, you can see that the left one goes left and the right
00:03:44 - one goes right. That's not too hard to remember.
00:03:47 - The other two, k and j, are a little bit tougher to remember.
00:03:51 - Now, j is to go down.
00:03:54 - So again, we're going down, and k is to go up.
00:03:58 - So up, j is down. K is up, j is down.
00:04:03 - I gotta be honest, there's not really great ways to remember that.
00:04:06 - I've heard some people say that um, you know,
00:04:09 - k you can remember a kite goes up in the air. So you can use that
00:04:13 - to remember that k means up. The one that means the most
00:04:17 - to me and I remember and it's silly but Jupiter has a lot of
00:04:21 - gravity and it would suck you down really fast. I'm kind of a space
00:04:25 - nut so, you know, my mnemonic probably won't work for you. But
00:04:28 - I remember that j for Jupiter, you would go down very fast if you were
00:04:32 - standing on Jupiter. So maybe you like that. Maybe you prefer to
00:04:36 - remember k is a kite that goes up in the sky. But j and k are
00:04:40 - down and up. And the other two, h and l,
00:04:43 - again they're right next to each other on the keyboard there,
00:04:46 - but they're pretty easy to remember because l is on the right
00:04:48 - and h is on the left. So if you're familiar with that, you know,
00:04:52 - play around with that a little bit. Test yourself if you need to
00:04:54 - so you know how to go up and down, left and right because that's
00:04:57 - how you get around a file as you want to edit it, right. So now
00:05:01 - you know a couple things about vi. You know how to get into
00:05:04 - insert mode which is to press i will start inserting characters
00:05:09 - at the place you're at, Thrafnursday, okay. Press
00:05:15 - escape to get back in the command mode. If you press A, that
00:05:20 - goes into append mode, and this is a subtle difference, right. If
00:05:23 - I pressed i, it started typing right at the, character that I'm in.
00:05:27 - If I press a,
00:05:29 - it goes to the character after. See how it did that? So it's flashing
00:05:33 - on the a in Thrafnursday.
00:05:37 - If you press a to go into
00:05:41 - insert mode, it appends it after. So then it starts typing after the a.
00:05:45 - Not much difference there, but that's, you know, that's the difference
00:05:48 - between using a and i. Then the other option you can use
00:05:51 - is to press o, and what o does;
00:05:55 - it goes into insert mode but on the next line. So it adds a
00:05:58 - line below, and you can start typing there.
00:06:02 - Hello! New line. And then again you press escape, and then you're
00:06:06 - back in command mode, right. So there's a couple of big things
00:06:10 - that we're doing there, and sorry if it's confusing but we're going to
00:06:13 - move on and go into some editing, not just adding some text
00:06:17 - here and there.
00:06:19 - I'm going to guess that you're pretty familiar with common
00:06:21 - editors like Microsoft Word or Notepad or or G-Editor, whatever
00:06:26 - it is that you're used to. Most have terms like copy, cut and paste. Well,
00:06:31 - vi has similar features, but they're called different things.
00:06:35 - I'm going to start with this so we can make our file grow a little
00:06:38 - bit more, alright. So let's use our, we're in the, press escape.
00:06:43 - Make sure, yes, we're in command mode. So let's go, let's go up, k
00:06:48 - for fly my kite, and let's put this whole line into the,
00:06:55 - the clipboard which is actually called the register, okay.
00:06:58 - And instead of copying it, it's called yanking it. So it sounds
00:07:03 - a little bit bizarre. But you yank a line of text into the
00:07:06 - register. So you press yy.
00:07:10 - You don't see any output, but pressing yy is going to put
00:07:15 - that into the register. And then let's say we press j to go
00:07:20 - down a line and we want to paste or put, it's actually
00:07:26 - put in vi terms, after this line. You press p and it puts
00:07:31 - it right below there. If you want to do it again, you keep pressing
00:07:34 - it. It puts it below the current line. Boom, boom, boom. So see that.
00:07:39 - We have, we, we put a whole bunch of things from the clipboard
00:07:42 - which isn't called a clipboard. Do you remember what it's called? The register,
00:07:45 - right, exactly, okay. So now we're still in command mode, right.
00:07:49 - So I can still press k and go up. It's not going to insert text because
00:07:52 - this is all done in the command, in the command mode, not in the insert mode.
00:07:57 - So here I am and let's say we want to cut out
00:08:03 - this line, okay. Now, we use the d command and you use dd,
00:08:10 - twice, and it cuts out or deletes that whole line. Now, just
00:08:15 - like with yanking, it's actually in the register now, okay.
00:08:18 - So let's go down here and I decided that I want to put that
00:08:25 - line in between, right, after this line. We're going to put it
00:08:28 - after that line, okay. Again, remember put puts it in the line
00:08:32 - after you, what you're currently on. It inserts it in a line there, right. So
00:08:35 - we'll put a couple of those in there. Remember we cut it or we deleted
00:08:40 - that whole line from the top. Now, you can delete more than or
00:08:43 - you can, you don't have to delete a whole line at a time. Let's
00:08:47 - say, let's go back up here, and I just want to get rid of this
00:08:51 - word. Then instead of dd, I would press dw for word, and
00:08:58 - it put that in, it cut out or deleted that word from that, from that
00:09:04 - line and now it's in the register. So if I want to,
00:09:08 - oh, I want to put it on a line of its own because that's what put
00:09:11 - does, I press p,
00:09:13 - and it put it there because it wasn't a new line. It put it after
00:09:17 - the character that I was at instead of after the line because it's,
00:09:21 - we'll do it a couple more times. See, it's right on that o character.
00:09:24 - It's going to put it at the next word over. Hello, hello, hello,
00:09:28 - hello. See how it's different? Now, let's say we wanted to
00:09:34 - put it somewhere else. Let's go down here
00:09:39 - and right there. So I want to put it right after that. If I put,
00:09:44 - it's going to put a hello right after that character. Now, if
00:09:47 - I delete this whole line, dd,
00:09:52 - and down here, if I put it, now I do, I deleted an entire
00:09:57 - line. So now it's going to put an entire line after this line.
00:10:02 - See. And really it did the same thing, but you have to remember
00:10:06 - when it cuts out a whole line, that includes the new line
00:10:10 - character. So it cut out the whole line. So it put a whole new line
00:10:13 - in. It cut out a whole word here. So put in a whole word right
00:10:16 - after it. So that's the difference with cutting a line and cutting
00:10:19 - a word. You can also do just one letter.
00:10:23 - Again, this is all still in the command mode. I can't just type
00:10:26 - words in here. I'm just using the keyboard shortcuts in the
00:10:30 - command mode. So let's go up. I just want to cut out this T.
00:10:35 - So d for delete and then l for just one letter.
00:10:40 - And I want to put that T somewhere else. I want to put it right
00:10:45 - after this T. So then I would put it and it would put that T right
00:10:50 - after the character I was at.
00:10:52 - See, so it puts it right after the p for put. So we have a lot, we're
00:10:57 - learning a lot here I realize that. But what we've, we've shown how
00:11:01 - to do yanking.
00:11:03 - So we come here. We can yank this whole line, yy.
00:11:08 - And it didn't delete it. It just put it in the register or
00:11:11 - like in the clipboard. And then let's go down a little bit
00:11:14 - and insert it right here. We're going to press p and it's going
00:11:18 - to put it in the line after this.
00:11:20 - See. Now, but you say it doesn't look different. Well, see, it's the same
00:11:24 - thing that we yanked before. So let's go back up just to be clear.
00:11:29 - We'll yank this line, yy, that line is yanked. We'll go down. Press p
00:11:35 - to put it in, in there, put it in the new line, alright.
00:11:38 - And let's say I just want to delete this exclamation.
00:11:42 - That's considered a word so dw. It deleted that whole word
00:11:46 - which is really just an exclamation point.
00:11:49 - And let's see, press l to go over this way, and after this
00:11:53 - character I want to put that exclamation. So I go to the character
00:11:56 - that I want to put it after and then press p to put it in there,
00:12:00 - put it in, alright. It's kind of confusing, but when you get used to it
00:12:05 - it's really fast. And it's important to know although you need to
00:12:09 - know the h, j, k, l keys, a lot of times the arrow keys work
00:12:13 - just fine in command mode, okay. So you can be lazy and do that,
00:12:17 - but on the test you're going to need to know the h, j, k,
00:12:20 - l for left, down, up, and right.
00:12:25 - Now that we've created this big messy file full of a whole bunch of
00:12:29 - similar things, it's a good time to show you how to search within a
00:12:34 - file. Now, we're in command mode again. So again, I'm not entering text.
00:12:39 - You'll notice that a lot of the stuff you do in vi is done
00:12:42 - where you don't actually type in text. It's a lot of yanking and putting
00:12:46 - and deleting and, and that kind of thing. So we're here, if
00:12:50 - you want to search for something and this is like in a configuration
00:12:53 - file or something, you may want to search for a specific term,
00:12:56 - you press the forward slash and you see how it, how it showed up down
00:13:00 - here? So you press forward slash and then what you want to search
00:13:04 - for. So I want to search for after. Now, there can be spaces in this
00:13:08 - too so after that.
00:13:11 - And I pressed enter and it found the first occurrence after
00:13:15 - where my cursor was. So it started at my cursor and then
00:13:17 - looked for the first occurrence of that. And now to repeat the
00:13:20 - search, you can either press n to just one keystroke, keep
00:13:26 - finding it.
00:13:29 - Or if you want to go backwards like you want to search up,
00:13:33 - capital N and it goes backwards.
00:13:39 - So I'm just going capital N and it repeats the search going
00:13:42 - backwards or up and lowercase n
00:13:45 - is the next occurrence or, you know, to search again for the same term.
00:13:50 - And now, since I'm talking about backwards, let's say you want
00:13:54 - to start a search backwards. Well, you press instead of a forward
00:13:58 - slash, you do a question mark. See, I typed question mark. It appears
00:14:03 - down here and now I want to search for the first occurrence
00:14:07 - of ello.
00:14:12 - Press enter. It found it right there. So now if I press n,
00:14:16 - it's going to find it right there because remember this is
00:14:18 - a backward search. So it's going backwards now when I press
00:14:22 - lowercase n.
00:14:23 - So it can be a little confusing after, remember, if you search
00:14:26 - forwards or backwards because n and capital N will go forwards
00:14:30 - and backwards according to whatever search you did, alright.
00:14:35 - And if you look, see, I'm pressing n to go backwards. If I press
00:14:38 - capital N, it kind of reminded me, okay, we'll do a forward search
00:14:42 - for ello if you do capital N, capital N, capital N. Lowercase
00:14:46 - n, lowercase n, lowercase n, it's the backward search
00:14:50 - for ello, alright. And then both of these searches, let's say
00:14:53 - I keep going, I keep going, oh, what do you think is going to happen
00:14:57 - next? Ah, it starts right at the bottom of the file and it continues
00:15:01 - searching, but it does tell you, see. Search hit the top so it
00:15:05 - continues at the bottom, and it just loops around like that, alright.
00:15:10 - So search n, n, n, go backwards. The same thing if we're going searching
00:15:14 - down, it will wrap and go to the top,
00:15:18 - alright. So that's searching. It's, it's pretty easy and it works
00:15:22 - really, really well. So now we've done all this beautiful work
00:15:26 - to this file, right. It looks so beautiful that we want to save it.
00:15:29 - Well, that's pretty easy to do. Again, we're in command mode now.
00:15:33 - So see, k goes up, j goes down. What you need to do when you're
00:15:37 - working with the files is you start with a colon. So press colon
00:15:42 - and some people call this execute mode, but this is just part
00:15:44 - of the command mode and this is a way that you save files or,
00:15:48 - or quit the program. And there's a couple ways to do that. Now,
00:15:53 - let's say that we wanted to start over editing this file from scratch.
00:15:58 - :e means start over like revert to save type thing.
00:16:02 - Now, if you've made changes and you tried to do just the :e,
00:16:06 - it will complain. It will say, whoa, if you do that, you're totally going
00:16:10 - to lose all the changes you made. And we all wanted to say Thrafnursday
00:16:13 - so it warned you. But let's say we really, really wanted
00:16:18 - to get rid of all of our changes, right. So you would type :e.
00:16:23 - An exclamation point means, yes, I know that I've made changes
00:16:28 - and I'll lose any changes I've made. It's like override for the
00:16:31 - safety precautions. So if we do that, it brings us back to the
00:16:35 - file that we started with, alright. So we're done with making
00:16:39 - all of our silly changes. All we're going to do now go down a couple
00:16:42 - things. I press o so that I can enter insert mode underneath here
00:16:47 - and that
00:16:49 - makes today June because, I don't know. That doesn't make any
00:16:54 - sense, but that's okay. Now, remember, I'm in insert mode now so I can't
00:16:58 - save the file. What do I do to get out? I press escape and that
00:17:01 - brings me back into the command mode. So then I press colon.
00:17:05 - W writes the file. Now, if you do colon w, it writes to the
00:17:10 - file that you started with. You know, I mean whatever it was.
00:17:13 - You typed vi file.txt. So if we type w, it's
00:17:18 - written to that file. If you wanted to name it something different,
00:17:21 - you could type :w and then newfile.txt. And
00:17:27 - then it writes it to a file called the newfile.txt, see,
00:17:31 - so that we can write it and, that's like save us in the world of
00:17:34 - Microsoft Word or something. If you want to quit, you type
00:17:38 - :q. But before we do that, let's say that we deleted
00:17:44 - this line and then we wanted wanted to quit.
00:17:48 - So :q, it's gonna say, whoa, again just like when we tried
00:17:52 - to revert to the original it says, you've made changes and you
00:17:55 - haven't saved them. But if we really don't want to save them like
00:17:58 - we x'ed, and we messed it up, if you type :q!
00:18:03 - the same thing happens. It goes right to, you know,
00:18:08 - it quits just right away. It doesn't save the file at all.
00:18:11 - So let's go back into the file. Now, this is the file that we had. And there's
00:18:16 - another way, instead of the colon, there, it's kind of a shortcut.
00:18:19 - Now, normally, what you do if you, if you make changes to a file
00:18:22 - that you like, I like that and I'll insert my name
00:18:27 - is Bob. (not really)
00:18:30 - And then I press escape to get back in the command mode. Normally.
00:18:34 - what you would type is :wq because you can string
00:18:37 - them together like that. So what this is going to do it's going
00:18:39 - to write to the file and then it's going to quit. So you press
00:18:43 - that, it writes to the file and and it quits, alright. So see now,
00:18:48 - ls, see now we have two files there, right.
00:18:53 - The first file that we have, we have the one that
00:18:56 - we, we just edited and then we have the one that we saved
00:19:02 - when we did that, right, and it said that there's a new file, right. So anyway,
00:19:08 - so we're back into our file here. So what we typed, that's normally
00:19:12 - you type again wq if you're going to save something, right,
00:19:16 - and then quit. There's a shortcut so you don't have to type colon at all.
00:19:20 - If you do capital Z, capital Z, it writes and quits. It's a shortcut.
00:19:25 - I never use that shortcut personally. I just like to, my
00:19:28 - fingers are just used to typing :wq. But ZZ
00:19:33 - is actually one of the items listed on the LPIC exam. So
00:19:37 - you should know that. Either capital Z, capital Z in command
00:19:40 - mode or :wq will write the file and quit right
00:19:45 - away. Now, one last thing I want to show you is how you can use,
00:19:51 - now again I'm in command mode, right. So kk goes up. How to change,
00:19:57 - use the c command. Now, it's a little bit tricky to get the
00:20:00 - hang of, but you can, let's say, for example, we want to c,
00:20:04 - change a word, so w. Now, see how this word now has that dollar sign
00:20:10 - after it. What it's going to do, anything I type now is going to
00:20:14 - replace the word today. So it could just be the word the,
00:20:19 - and if I press escape, see, it replaced the word today with the, alright.
00:20:24 - So, but let's say we wanted to do something like, go to the beginning here, change
00:20:29 - this word to, Today is really cool, and then press escape.
00:20:37 - It's replaced that, it's changed that word today to Today is really
00:20:40 - cool. So what it does basically is it takes that word. Now, you can
00:20:44 - do the same thing with just a letter. Let's say I want to change
00:20:48 - this letter
00:20:50 - with yyy, and then press escape, alright. So you can do it just to
00:20:55 - one letter or to the whole word and change is using c.
00:21:00 - I don't use it personally very often, but if you want to replace
00:21:04 - this weird word that I made now, we could say cw,
00:21:09 - Today is really cloud, cloudly, cloudy, press escape. And then
00:21:16 - it's replaced it with cloudy, alright. So that's how change
00:21:20 - works. Now, let's look over all of our different vi things,
00:21:23 - so maybe we can wrap our brains around it. Now, I know we went over a
00:21:27 - lot of stuff really quickly. So you may want to go over this
00:21:30 - video a couple times and practice playing with a few text files
00:21:33 - on your own. But basically, let's go through. The forward slash is
00:21:36 - how you search for something in the forward direction going
00:21:39 - from top to bottom of a file. If you want to search backwards, you use
00:21:42 - question mark. Again, this is in command mode. When you search
00:21:46 - the first time, a lowercase n will continue that search in
00:21:48 - the same direction and a capital N, again, in command mode, will
00:21:54 - continue the search in the reverse direction, so the reverse
00:21:57 - of how you started. These keys, h, j, k, and l are right next
00:22:02 - to each other on a keyboard and they correspond to left, down,
00:22:05 - up and right when you're in, I'll say it again, command mode, alright.
00:22:09 - Now, to enter insert mode, there's a few different ways that
00:22:12 - you can do that. If you press i, it's going to enter insert mode
00:22:16 - at the current character that you're at. If you press a when
00:22:20 - you're in command mode, you're going to enter insert mode at
00:22:23 - the character after the one that you're on right now. So like
00:22:27 - if you're at the last letter of a word and you press a, you're going to
00:22:30 - start inserting at the character after that. And then o will
00:22:34 - enter insert mode and it inserts a line underneath the current
00:22:37 - line that you're in and you start entering right there. So if you're
00:22:40 - in the middle of a file and you want to enter a new line right below it,
00:22:42 - you press o and then you're in insert mode on the line right
00:22:46 - below it. It turns into a blank line, alright. And then to get back
00:22:49 - into command mode, you press the escape key. So if you're in
00:22:52 - insert mode, you press escape to get back into command mode
00:22:56 - where all of these other things work, alright. So that's cheat sheet
00:23:00 - page one.
00:23:02 - And here is cheat sheet part 2 where we talk about how you can modify
00:23:07 - some things like change. We just learned that last, c and then you
00:23:11 - can either enter l
00:23:13 - in, in there for changing one letter or w, cw
00:23:18 - will change the current word like we just showed you, okay. The same thing
00:23:22 - with d. Now, d stands for delete. But if you're used to Windows
00:23:26 - or, you know, the standard word processing terminology, you might want
00:23:30 - to think of it as cutting because it puts whatever you delete
00:23:33 - or cut into the register so that you can put it somewhere else later.
00:23:37 - So you can either delete a word or you can delete a line,
00:23:41 - delete line, and you can do that or, or a letter, I'm sorry,
00:23:46 - l is for letter. Or you can delete the entire word. Now,
00:23:50 - with yank, you can do a letter at a time using l or you can do
00:23:55 - an entire word at a time. And again, yank is much like copy
00:23:59 - would be in a word processor. It leaves it there, but it puts
00:24:02 - it in the register.
00:24:04 - And then down here, yy is to yank an entire line, dd is
00:24:08 - to delete an entire line. Again, both of these put it in the register.
00:24:13 - And then to put things back or paste if you, if you prefer
00:24:16 - to think of this as paste, the p will put the contents of
00:24:20 - the register at your current place. If it's an entire line, it
00:24:23 - will put it at the line below you. If it's a letter, it will
00:24:26 - put it at the character next to you. If it's a word, it will put it at the
00:24:29 - character next to you. So depending on what it is you have in
00:24:32 - the register or in the clipboard, if you want to think of
00:24:34 - it that way, it depends on how put will put it on the screen, alright.
00:24:38 - And if you completely mess up your file with all the silliness
00:24:41 - that you've been doing :e! will revert to
00:24:46 - the original file, okay. Even though you've made changes, it will bring you right back
00:24:49 - to the original file that you started with. One more page and
00:24:52 - then we're done with our cheat sheet here. Now, let's say
00:24:55 - that you've made changes and you want to write and edit or
00:24:58 - write and exit, there's two ways you can do that. The more common
00:25:02 - way one or the one that I see most often is :w for write, q for
00:25:06 - quit. You can put them right together on the line like that or in
00:25:10 - the command mode you just the capital Z, capital Z will
00:25:13 - write and quit. Now, if you want to write and even if it's a read
00:25:18 - only file, if you put the exclamation after the w, it's
00:25:21 - going to write even if it's a read only file, alright. So that's kind
00:25:25 - of dangerous. You have to be careful if you're going to write to
00:25:27 - something like that. And then :q! is quit
00:25:31 - without saving which if you mess up a file and you just want to get out of
00:25:35 - there, you can quit, exclamation point, and that will get you
00:25:38 - out of it. Like I said, I know this nugget has been really, really
00:25:43 - chock-full of a lot of confusing information. The best way though
00:25:46 - is to just try playing with vi. I promise it's worth it, and in the
00:25:51 - end you'll have a nice smiley face and apparently red hair.
00:25:54 - I hope this has been informative, and I'd like to thank you for watching.

Create Partitions and Filesystems

Maintain the Integrity of Filesystems

Control Mounting and Unmounting of Filesystems

Manage Disk Quotas

Manage File Permissions and Ownership

Create and Change Hard and Symbolic Links

Find System Files and Place Files in the Correct Location

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Shawn Powers

Shawn Powers

CBT Nuggets Trainer

Certifications:
LPIC-1; CompTIA Linux+, A+; Cisco CCNA

Area Of Expertise:
Linux

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