Elephants to come back in this lesson they're going to learn how to secure the Grupp groups and for
Grand Unified bootloader which is used to load the operating system from the disco.
So protecting grub is very good in the Linux environment because there is a feature of page hacker can
get you a system before actually loading the operating system.
OK.
So let's see how hacker can get it go system.
OK he can either log in or get into the system as a single user mode or he can copy or get some important
information or you could good configuration file.
OK.
Before actually loading the operating system.
OK.
So let's see how hackers can get it to art and how to protect our grub.
OK I'll see here when you start.
So were these pop ups here and when you press the OK we get it treated more.
So hackers can get into this more.
You can log in as a single user mode and when he locks in it has a single user mode.
He will be the root user and he can perform any operation he can damage your system.
OK.
Or he can copy or collect some important information with cat come on.
OK.
So we need to protect.
OK.
Our third word to get anybody in this Ditmore.
OK.
So just press F then who would normally
Please log in as root
before actually protecting the Grug you need to install a software package Corley's GP.
OK.
So just get all
GPL VPM either text this utility which will help to copy the text on your computer screen.
OK here because I can select this with mouse.
So no of those stolen GPA you need to create a password for the club.
OK you can medically actually said the password in human readable form or you can create an incomplete
password.
So here I'm going to show you how to grade encrypted password for the grubworms so just type here.
Grug was W.D. and we began to look at this create an encrypted password here for the password that you
are set for drub.
OK.
Now this is our password.
So copy the text here like this.
OK up to this line glub glub.
God PBK D.
OK.
Now it is copied.
Just select these lines.
And after this go to the file which is present in the directory it is the rock not the cookie list to
find here.
OK here for me and this custom you need to open this file.
So the Scopa
in here you'll need to set the username and password so that the user name just typeset use is equal
to add make sure don't have any space here.
OK.
Between the superuser and this equal operator and here in the well called Paul the username name I'm
going to set the superuser as a rule.
Or you can set any user name which is present.
OK.
And here just provide parse word underscore BBQ you have to get in here space.
You certainly know here.
Just plug the middle button on your mouse.
This is the buzzword which is preparing for it.
Just write down the data and of the read the data.
The next step is you need to update the club.
So just type of deck Gruppe.
OK.
And of course this just reboot your machine.
And let's see what happens.
OK.
I'm going to press the
OK here you can see of pressing need is asking me to enter the username and password.
OK now let's enter the password sorry center the username and here into the password.
In this way you can protect the bootloader from hackers from these kinds of attacks.