Instructor: Hey, folks, in this video,
we are going to cover some of the important things
that you should know and remember in Linux,
and very first thing is Linux
has a super-user account called root.
Root is the most powerful account that can create,
modify, delete accounts,
and make changes to system configuration files.
Even root can delete its entire operating system as well,
if you issue a remote command on its main
operating system files, so be very careful.
Also, Linux is a case-sensitive system,
meaning a file or directory that is created
with uppercase ABC is not the same as lowercase abc.
Next thing is avoid using spaces
when creating files and directories.
Yes, because when you create spaces in a file directory
just like as if you are doing in Windows environment,
Unix doesn't really like spaces,
and it will be very hard for you to log in
or CD into those files and directories,
so do not use spaces.
Instead, you could use hyphens or dashes.
Then Linux kernel is not an operating system.
It is a small software within Linux operating system
that takes commands from you, from users,
and pass them through the system hardware and peripherals.
Then Linux is mostly CLI and not GUI or GUI.
What is CLI?
CLI stands for Command-Line Interface,
and GUI stand for Graphical User Interface.
So when you are using Windows operating system,
you will see everything is in a GUI.
You use your mouse, you drag, drop,
but in the Linux, most of the corporate environment,
you'll see nothing like that.
You'll be given a prompt where you would have
to run the command using your keyboard only.
And the last thing to remember is Linux is very flexible
as compared to other operating system.
Yes, it might seem hard at the beginning,
when you are learning commands in that operating system,
but once you know Linux, you could do so much
in Linux operating system that you weren't able to do
in other operating system.