The word command has three different meanings in Linux.
So the first is a command is just a program here, just let's change my mouse.
Yeah.
Command is just a program pro.
So command is a just a program.
So this is an executable program named and executed by a single word such as the LZ here, LZ, or a
similar feature built into the shell, such as the CD here.
Actually, let's see, LZ, see the cat?
And goes like that.
So we also the command is also can be a similar command.
So this is a program name or a shell built in.
Actually, the simple here.
Simple.
So this is a shell built in or optional, followed by an argument such as Here the simple command is
like L.
S and here it calls the L here.
And after that the, for example, home.
So this is a simple command.
And we also have a combined command combined.
Combined command.
So this is a several simple commands treated as a unit in combined.
Command here.
So let's actually write something like that.
So we have L.
Else here.
So after that, it's L and.
That's been here or home?
Home.
And after that, we have we are using the pipeline here and then we are writing less.
For example, this is a combined command.
So why I'm telling combined is that, for example, here we are using a program, so we are using program
here.
So LS is a program.
This is a program.
Also the less here is also program, but less.
Home is a simple command.
So this is a simple command.
Simple.
So command here.
So also these two are the.
What I said.
The program program.
But here the all of these are a combined command.
So actually, let's delete that.
Yeah, all of these are a combined command.
So here it is, the combined.
This is all of this code here.
The comment here is a combined comment.
So, um, in this course I will use the word command in all these ways.
So usually the surrounding context will make clear which one I mean.
But if not, I will use one of one of the more specific terms in our next lectures here.