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Hello everyone.

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In this demo I'm going to talk about C Linux is Linux is a security enhanced Linux.

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We can consider a C Linux as a Linux kernel security module to provide and support access control security

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policies for the applications, processes and files on the system.

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So if I would like to show what is the current mode or the status of C Linux in the operating system

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here.

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So I'm going to type the command C e status.

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Then I hit enter as we can see over here.

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So the current mode it's enforcing now if I would like to change the mode temporarily, so I would like

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to change this Linux mode temporarily, for example, from enforcing to permissive.

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So I'm going to type the command sit in force, then space, then zero hit enter.

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I'm going to type the command C status.

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As we can see over here, we have change the mode for the C Linux temporarily.

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Like if I would like right now to change it back from permissive to enforcing.

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So what I'm going to do so sit enforcing then I'm going to type the number one.

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So space one hit enter and I'm going to type C status hit enter, as we can see over here.

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So the current mode right now it's enforcing.

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So what I have done, so I'm just trying to change the mode temporarily.

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So if I change it right now, for example, from enforcing to permissive, then I reboot the system.

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It will not save the the mode that we have changed.

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However, if I would like to change the mode permanently for the C Linux, I can change it in the file

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configuration under the slash ATC slash C Linux.

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So I'm going to go to the slash ATC slash C Linux hits enter.

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And so, so as you can see over here, this is the configuration file.

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So vim config hit enter.

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As we can see over here, we can change the modes permanently and C Linux and this file, as we can

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see over here.

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Here is it so the current right now the current mode for the C Linux it's enforcing so I can change

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it either to permissive or also I can disable it.

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So after we change the mode and the file configuration here.

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So what I need to do, I need to say, for example, here, see as you can see here, so I'm going to

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save, then I need to reboot the system.

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So it's really important.

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If we change anything in the file configuration, we need to reboot the system in order to save the

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configuration and the mode that we have changed.

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If I would like to get more information about the Linux so I can go to the man page man C Linux hit

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enter.

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As we can see over here.

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Here is the man page of the C Linux.

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You can get more information about this command in the man page.

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So that's conclude our session.

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Thank you and see you in the next lesson.