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Hey, welcome back.

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So now we are going to see how we can remove permissions in Linux.

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All right.

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So in the previous lesson, we have seen how to add permissions.

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Removing permissions is exactly the same way.

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It's very, very simple.

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So as we can see over here, what are the permissions given to the file?

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X, Y, Z.

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We can see we have given all the permissions to everyone.

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So let's quickly now remove the permissions for others, which is.

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Oh, right.

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So for that, we are going to write C mod and O minus because we need to remove permissions this time

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for others and which permissions.

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So let's try to remove all the permissions.

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So minus W, X and for the file X, Y, Z.

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So let's quickly write this C mod or minus r w, x for x, y, z.

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And let's quickly see the permissions now.

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And you can see there are three dots or three hyphens, which basically means that there is no permission

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which has been given to the file X, Y, Z.

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And we have successfully removed all the permissions of read, write and execute.

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Now let's quickly verify this.

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So let me switch user to Udemy and we have switched the user.

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Now let's try to read this file.

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So Cat X, Y, Z, and according to the permissions that we have given, we should not be able to read

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the file.

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So let's try and verify this.

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So let me just press enter and let's see what is the output that we get and correct.

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It says permission denied because there is no read permission which has been given to this file.

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Perfect.

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Let's try to write it.

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And for obvious reasons, we are going to get the same error, which is permission denied.

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Let's verify this and you can see the error, which is permission denied.

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We can neither read or write.

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Also, we cannot execute it.

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Perfect.

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Let's go back and let's try to read the file with the root user.

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And we are able to read the file because the root user currently has all the permissions, as we can

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see over here.

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So I hope you guys understood how you can remove permissions for user group and others.

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Thank you.