Lecture 1.2 - Login

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From the course by University of California, Irvine

The Raspberry Pi Platform and Python Programming for the Raspberry Pi

1395 ratings

University of California, Irvine

The Raspberry Pi Platform and Python Programming for the Raspberry Pi

1395 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 1.1 - Linux Basics4:55

Lecture 1.2 - Login2:39

Lecture 1.3 - Linux Filesystem3:32

Meet the Instructors

Ian Harris
Professor
Department of Computer Science

[MUSIC]

Module 2, Lesson 1 Lecture 1.2: Login.

Linux machines have kind of a number of accounts,

[COUGH] just like other operating systems, it's a common feature.

They have a number of user accounts.

Now, each user account has associated with it a username and a password for

identification and authentication.

So when you first start the machine,

you're prompted for a username and a password.

Now the default patent username,

the account that it gives you by default is pi.

That's the name of it, so that'll be the username.

And the password, default password is raspberry,

which you can change, we saw through the raspberry config.

So, you start off, that's a login process right there,

where you give the username and the password, and it logs you in.

Now, first command we'll talk about in the command line is man page, a man command.

Getting manual pages, or man pages, people call them.

So, there are whole lot of commands in a Linux or Unix environment, and

you won't necessarily remember all of them all the time.

So often you're at a machine and you know the name of the command but

you don't remember how exactly how to use that command.

Right, because these commands have lots of options on that you can add to them.

And you, maybe you don't remember an option or something like that.

So you type man and the name of the command at the prompt, so

you can see up there, I say pwd.

I know there's a command pwd, but I forgot what it does.

So to find out, I type man pwd, hit Enter, and then what'll appear is the screen

will change and it will immediately become what you see at the bottom.

Which, this is just the beginning of it, but it's the man page.

It's a description of the command.

There's a name of the command, its synopsis,

its description, gives you all its options, all that.

So that will appear on the screen, I'm just showing you the top part of it, but

the man pages can be pretty long.

So, there are man pages available for all of the Unix and Linux commands.

So, you can find out by a command that way by using its man page, and

that's a helpful feature a lot of the time.

So, it gives information about some Linux command.

And that used to be the only source of information you had.

But now you got the network, you can also Google, right?

You can just Google something and ask it for help.

But man pages are really useful,

just sort of a local store of information about the operating system.

[MUSIC]

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