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.
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