Lecture 2.2 - Text Editors

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From the course by University of California, Irvine

The Raspberry Pi Platform and Python Programming for the Raspberry Pi

1175 ratings

University of California, Irvine

The Raspberry Pi Platform and Python Programming for the Raspberry Pi

1175 ratings

Course 4 of 6 in the Specialization An Introduction to Programming the Internet of Things (IOT)

The Raspberry Pi is a small, affordable single-board computer that you will use to design and develop fun and practical IoT devices while learning programming and computer hardware. In addition, you will learn how to set up up the Raspberry Pi environment, get a Linux operating system running, and write and execute some basic Python code on the Raspberry Pi. You will also learn how to use Python-based IDE (integrated development environments) for the Raspberry Pi and how to trace and debug Python code on the device. Please note that this course does not include discussion forums.

From the lesson

Module 2

The Raspberry Pi is typically installed with a Linux-based operating system, so we present the basics of Linux and its use. We describe some of the main features including navigating the file system and managing processes. We describe the text-based user interface through the shell and we overview the graphic user interface which is the default with the Raspian Linux distribution.

Lecture 2.1 - Navigating the Filesystem4:49

Lecture 2.2 - Text Editors3:40

Lecture 2.3 - Accessing Files4:08

Meet the Instructors

Ian Harris
Professor
Department of Computer Science

[MUSIC]

So, creating files.

You often want to create a file for one reason or another, or

modify a file as well.

Actually, this isn't just creating files, this is really for

modifying existing files.

And that actually is a common thing to do.

Say you've got a file.

This happens with setup files.

So inside Linux machines, there are often files, not just Linux,

any operating system,

there'll be files that specify something about the setup properties of the device.

And if you wanna edit these files, it's a similar process to creating a file.

So accessing files, let's say.

If you wanna do this, there are many ways to do it,

depending on the type of file you wanna manipulate.

Typical method involves a text editor of some kind.

So a text editor is like a word processor but simpler, you know,

bare bones word processor, think like that.

So you know Microsoft Word, right?

Microsoft Word has all these fancy features.

You know, spell check, and all sorts of nice things that it has.

Text editors are bare bones.

They don't have any of that stuff, typically.

They, some of them do, some of them do.

But basic ones, they're just bare bones.

Several are available on Linux for free.

Tons are available on Linux for free.

Several are built in, built in to Raspberry Pi, like vim.

Actually, I don't think vim is.

Emacs is what I use.

Vi, vim, there are a bunch of them.

But we're gonna focus on something that's built into Raspberry Pi here.

We'll talk about that.

We want something that's already built in.

You can download and install new ones.

And we'll talk about how to download and install software, but

that's not necessary right now.

Choose one and stick with it, is my thought.

Because all these text editors,

they have different control sequences that you need to become familiar with.

It's easiest just to learn one or two and get used to them.

Okay so Nano is one that you would use from the command line.

So if you're at the command line and you wanna run this Nano text editor,

just type nano at the command line.

N a n o lowercase, hit return and it will give you something like this.

Oh and by the way.

Right now I'm talking about command line text editors.

If you're using the GUI you can use,

there are a lot of text editors that you can use.

I mean, you can run ones with nice graphic user interfaces.

This is something that's running at the command line, in the terminal, and

it's sort of bare bones.

Right now what you see is a window and I typed in some random text.

I wrote test and test.

You can type whatever you want, right?

You can make the file.

Then you can save it.

So I hit Ctrl-S, I believe, to save.

And right now, I'm in the process of saving it.

You see at the bottom.

It has a bunch of different commands there.

So I'm typing in the file name that I wanna save to and

I'm gonna hit return it's gonna save.

So, these things,

these programs are basically they have all the operations that you'll expect.

File save, open, that type of thing.

You can type in your text, delete the text, save it, open it, and

stuff like that.

Now, It has a lot of other different options,

I'm not going to go through all the options.

You can learn about those options at your leisure right?

But Nano is a good text editor and is very simple.

You can use it over a text interface, you don't need graphics or anything like that.

So Nano's one that you could use and it's pretty nice.

Basic functions are via Control sequences.

So, Control-S will save, Control-C does something and so on.

So, it's usually Control sequences that you use to use a program like this.

Thank you.

[MUSIC]

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