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How to open an image file? I know a lot

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of people, a lot of my students have

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asked me that we could open a regular

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file, a txt file using vi, cat, more, head,

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or any other ways to open, it's easy or

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even vi the file to open a text file.

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Now the question that came up was how we

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could open an image file using the

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command line? Well, first of all, if you

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are in a GUI environment, you could

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simply double click on that image file

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and it will open up. But if you do not

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want to use the double clicking thing,

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and you want to run a

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command to open up a file, an image

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file, then there is a way to do that. So

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image file formats are standarized means

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of organizing and storing digital

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images. Image files are composed of

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digital data in one of these formats

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that can be rasterized for use on a

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computer display or printer. An image

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file format may store data in

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uncompressed, compressed, or vector

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format. This definition is straight out

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of Wikipedia. I just want to quickly go

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over it. What we will learn in this

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lesson is how can we install a program

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that will allow us to open an image file

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and command syntax to open that image

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file in GUI. Alright, so let's go into

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our Linux machine. I have my Linux

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machine right here. Now, if you have an

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image you could undergo, you could just

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simply double click and it will open up.

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But the question right here we have is

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we want to run a command to open up a

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image. But please do remember, if

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you are getting into your Linux machine

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through SSH or through PuTTY, and then

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you try this, it will not work because

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images, GUIs, and stuff like that do not

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work on Linux terminals. So for us to

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try out how we could open it, we have to

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actually first get an image into our

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system. So I have my Firefox open. I

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went to google.com. And I actually

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[No audio]

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clicked on Google, I typed Linux, I went

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to images, and it gave me all bunch of

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Linux related images. Let's pick any one

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that you like, I will pick this penguin.

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Right click on this image and click on

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Save Image As, this will ask you where do

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you want to save this image. So pick

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Desktop because this is your Desktop

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where you will be saving your image. So

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scroll down and click Save. Now you

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could go back up, you could close this

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Firefox because our image is downloaded.

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As you can see it is right here. And if

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you want to open up this image in GUI,

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all you do is you double click and it

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will open up the image in your Linux,

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perfect. Now, again going back to my

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question is, now how can we open that

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using command? So which directory I am in?

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I'm in home/iafzal. If I go to my

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Desktop, and do ls -l, I do see the

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file is there which is 1200px which is

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the same name as this. If I do cat on it,

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[No audio]

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that what will happen? Oops, it doesn't know

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what that file is or how to open it.

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Then what which other command that I

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could run to open that image? Well for

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that you have to install a program

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called image. So what this document says

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is basically you have to become root. So

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let's go become root, and then you have

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to run the command yum install ImageMagick.

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That's a package name actually.

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So let's clear the screen, and before we

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do the yum install, let's make sure we

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could get out to the internet. So to

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confirm that we could get out to the

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internet you could simply ping www.google.com,

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and we are getting the reply back, perfect. Now you could go

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ahead and do yum install ImageMagick -y.

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[No audio]

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So it is looking for the package that we

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want want to download it is looking for

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dependencies. Okay, it asked that the

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package install packages size is 9.1

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meg, it went pretty fast, because we have

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given the option to, given the option

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of y, which is -y for yes to

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go ahead and install it. Now let's

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confirm if that image, rpm has been

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installed. rpm -qa | grep ImageM, so there you go.

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ImageMagick, this is the rpm, this is the

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program that allows you to open your

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image file. Now you

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have to run the command which is

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displays base image of the file, the

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file name actually. Alright, so before

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we do that, let's get into our directory

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where that image is located. So that is

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in our /home/iafzal directory.

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When you do ls -l, you will see it

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has all the directories and files. But

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we had downloaded that image file in

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Desktop folder, then do ls -l, and

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you will see our file is there. Now you

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can run the command display, the file

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name, and hit enter, and this will open

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up your image file. That's how it works

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if you wanted to use this command to

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open up the image file. But anyway, I do

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want to let you know in corporate world,

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we do not have too much application or

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it's used in a real world. We

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don't really use this command or this

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package. But anyway, I listen to my

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students as always, and I have included

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this lesson. So this way if someone

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wants to find out how to open an image

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file through the command line, they will know

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how to do that. All right, good luck.

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[No audio]