Instructor: Hello everyone and welcome
to the lecture Keyboard keys used in Linux.
Now, you're probably thinking,
hey, I'm going to the keyboard keys,
but I already know these keys.
Great, if you know these keys, beautiful,
and I would recommend you could go ahead
and skip this lecture right away and go to the next one.
But I have created this lecture
for those people who are trying to get
into IT for the very first time.
And I have seen and I have experienced
that those people who are trying for the first time,
have or had a problem in the past understanding these keys
or even pronouncing these keys.
These keys are the actually symbols
which are primarily on top of the the digit keys.
So I'm going through these keys one by one
so you understand actually how to access them
and how these keys are pronounced.
So let's go to the first key.
First key is escape key,
Escape key is used whenever you are.
especially in a VI editor,
and you have any key press or in editing mode,
you could escape it and it will get you out of that.
So as it sounds, escape is your escape key
It's your lifesaver to get out
of any of the previously pressed keys.
Then we have tilde, which is the key right below it.
Tilde is that little curly thing
on top or right below that escape key.
Usually when you do CD tilde,
it's actually taking you to your home directory
and right below that, tilde, we have the backtick.
Now, don't confuse the backtick
with a single quote or even comma.
Backtick is kind of like backward
and it is like a backward to the single quote.
Then we have the next key is the number one
and on top of the number one we have a symbol
that is called exclamation point.
Now, a lot of people heard of exclamation point, great,
which is kind of like emphasizing something in English
and in Linux you could also refer this
or also many times it is referred to as bang.
The next key is at sign and I'm sure a lot
of people are familiar with that.
If you have an email, then you'll notice that your email
has your name in front of it and then after that,
followed by the at sign and the domain.
For example, at hotmail gmail.com
or wherever your email account is.
Number three key has a pound sign on top of it,
also referred to as hashtag.
In Linux, this key is used in scripting
or in a file or any configuration file
to comment out any of the things that not gonna be used
and just for information purposes.
The next key number four has a dollar sign.
In scripting language,
that dollar sign is defined as invariable
which will cover in the shell scripting module.
The next one is the percent sign.
Number six has the caret sign,
also sometimes it people in a simple language,
they call it as cap, but in Linux--
Whenever you hear caret,
it means anything at the beginning of something.
So if you're doing LSS minus L
and you wanted to grab something
that starts with something,
you could use the caret sign.
Number seven and ampersand and ampersand or add sign.
So that is also to put something in the background.
If you're running a script, you could use ampersand
and it will put the script
or your process in the background.
Then number eight has the asterisk sign.
Also, if it's hard to pronounce,
you can pronounce it star so many times
I also pronounce it star, so it doesn't really matter.
You pronounce it star or asterisk it,
both are okay.
Then number nine, it has open parentheses,
now again, don't confuse open parentheses
with with curly braces and bracket,
which I will cover right after in the second line.
So keep in mind number nine,
the curly thing looks like a half C.
is referred to as open parentheses.
Number zero has closed parentheses.
Then next to it we have the hyphen sign.
Hyphen sign, no, first of all, on top, it's a underscore
and then the bottom is hyphen,
which is also used as an option or dash.
So if you're running a command in Linux,
then you have to specify sometimes the options with it.
Every time there's an option that needs to be accessed
you have to specify that dash.
So whenever you hear dash or hyphen, they both are referred
to as each as the same key interchangeably,
plus sign equals sign,
we all know.
Then we have a tab key,
which actually skips few spaces,
then there is the most, one of the important keys
that is curly braces.
So opening the top one is the opening curly braces
and the bottom one is opening bracket, just like that.
On the right-hand side,
the top key is closing curly braces
and the bottom key is the closing bracket racket.
Alright, enter key or enter key.
So this is--
I'm sure everybody knows enter key,
but sometimes people also referred this key
as carriage return.
Then we have colon key and semi-colon key.
These two keys are used in scripting language
as well or whenever you're using via editor,
you could specify colon WQ to save the file,
which will cover later on, of course.
Then we have double quote and a single quote.
So remember the single quote below is not a comma,
so it's a single quote.
So double quote on top, the bottom is single quote.
And then the key that is mostly gonna be used
in Linux right here is called pipe,
which is a simple straight line.
It is used to combine a few commands together
or take the output from first command
and give it to the second command.
Below it we have back backslash,
Now remember backslash is used in windows.
So whenever you are specifying a path,
that backslash the path that is given in windows
it is used with a backslash.
And in Linux it is used with a forward slash,
which I'm going to cover in this line, the fourth line.
All right, so shift key,
whatever the keys that I'm talking about
that is above numbers that can be accessed
by pressing shift key.
Then we have less than sign
and below the less than sign, is the comma
and the next one is greater than sign
and below the greater than sign is period or dot.
Now, these less than sign or greater than sign
is also referred in Linux as input and output.
So if you are using two greater than sign,
it means appending to the file.
But if you use one greater than sign,
then it will overwrite to a file,
whereas less than sign will take the input from the output.
Again, don't confuse it right now,
I just want you to learn how you could access these keys
and how you could pronounce this key.
So later in the lecture, I don't want you to be,
hey what is pipe or what is tilde
or what is greater than sign?
How can I access that?
So that is why I have this lecture for you.
And then next key is the question mark
and and below it is the forward slash.
As I mentioned in the in the line, in the row above it,
the back slash is used for Windows.
The forward slash is used in Linux.
So you could access the path in windows to the command line
to the backslash, but in Linux you have to use forward slash
And the last key I wanna cover is the right control
key you you see on the keyboard you have two control keys
one on the left side and one on the right side.
Many times in in virtualization or Oracle VirtualBox
if you wanna get your get your mouse,
which is trapped inside the window.
If you want to get out of that and release your mouse
you have to use this a right control key.
Also in Linux, when we are using certain commands,
when you do right control key,
it will do a different function
than than pressing the left control key.
Alright guys, so I hope now you understand each one
of these keys and how to access them
and how to pronounce these keys.
Now, maybe I have pronounced couple of them differently
or maybe it's pronounced different way depending
on which country you are living,
but that is perfectly fine as long
as you know where and how to access each one of these keys.
But in Linux world,
most of the time
that I have experienced these keys are accessed
or pronounced the way I have explained in this lecture.
Anyway, I hope this lecture served this purpose
and if you have any question
please do send me a message about any of these keys
or if you don't understand the functionality
of any of these keys, good luck.