Original subtitles

1 1

Now that we created our virtual machines, 2

2

it's a really good idea to take snapshots of them. 3

3

A snapshot allows you to store the state 4

4

of the current virtual machine. 5

5

So allows you to go back in time 6

6

or go forward to a certain state after you go back. 7

7

So you can think of it as bookmarks. 8

8

For example, now we can take snapshots 9

9

of our fresh installation of the operating systems. 10

10

And in the future if we update or configure something 11

11

or break something, you can literally just go back 12

12

to the fresh install or go back to factory settings 13

13

if you want to call it. 14

14

Then if you did something there 15

15

and then you wanted to go back to your updated system. 16

16

Then you can go back to the updated system as well. 17

17

So it can literally take a snapshot whenever you want 18

18

to store the state of the machine. 19

19

And then you can go back and forth between these states. 20

20

Now I'll show you how to do that. 21

21

I have Kali-Linux right here. 22

22

The one that we installed. 23

23

And it's very easy to create a snapshot for it. 24

24

All we have to do is just go on the snapshots here 25

25

and click on the camera icon. 26

26

Then it's gonna ask you to call the snapshot something. 27

27

So I'm just going to call it Fresh Install 28

28

and I'm just gonna give it the description 29

29

saying it's a fresh snapshot with no updates. 30

30

It's always a good idea to give a good name 31

31

and good description so that in the future, 32

32

you can actually remember what's the snapshot stand for. 33

33

So now that I'm done, I'm just gonna click on okay. 34

34

And now you can see that we have the current state. 35

35

So whatever you do in here. 36

36

You can update. 37

37

You can install programs. 38

38

You can install libraries. 39

39

And then if you break something or you ever want to go back 40

40

to the fresh install, you can just come back 41

41

and click on the fresh install and restore. 42

42

So let's see now. 43

43

I'm just gonna go back to the details as normal 44

44

and then we're gonna start our virtual machine. 45

45

I'll just show you an example now. 46

46

So let me just create a new directory in here. 47

47

So let's imagine that you actually updated the system. 48

48

Now in the future, we're gonna talk 49

49

about updating the system. 50

50

And I'm gonna tell you that when you update, 51

51

there's a good chance some libraries 52

52

some programs will not be as up to date 53

53

as the libraries that will be installed. 54

54

And then these programs might start giving you issues. 55

55

Now if you have the issues, you can put them into discussion 56

56

and I'll help you with them. 57

57

But some cases, I'll tell you that you'll need to go back or 58

58

downgrade to the older version without the update. 59

59

So all you'll have to do is just get back 60

60

to the fresh installation to your fresh snapshot. 61

61

So now just created the new file just to show you 62

62

that once you actually go back, everything will go back 63

63

to the way it was before the changes that you made. 64

64

So I'm just gonna turn off Kali. 65

65

And now if we go back to the snapshots, 66

66

you'll see that we have our current state. 67

67

This state has been changed so it's the changed state. 68

68

Now let's say that you updated 69

69

and the update was successful. 70

70

So nothing was broken and you are happy with it. 71

71

So what you should do is that you should just come in and 72

72

click on the camera icon again to create another snapshot. 73

73

And we're gonna call this one Updated System. 74

74

And then you can just put the date if you want to. 75

75

And then I'm just going to put the description 76

76

updated with no problems. 77

77

So I'm gonna click okay. 78

78

And you can see that we have two snapshots. 79

79

We have the first one, which is our fresh install. 80

80

And then we updated our system 81

81

and we have an updated snapshot of an updated system. 82

82

So now let's say that after you updated 83

83

and you thought that everything was okay, 84

84

you are using the machine and you have problems. 85

85

So you wanted to go back to the fresh installation. 86

86

All you have to do is just click on the fresh install 87

87

and you can see the restore icon right here. 88

88

Just click that. 89

89

And now it restored me to the fresh installation. 90

90

So now if I start the Kali machine, 91

91

you will see the new directory 92

92

that we created will disappear. 93

93

Now as you can see, we are back to where we were 94

94

without the new directory, without anything. 95

95

So we are actually back to the fresh installation of Kali 96

96

to when we actually took the snapshot. 97

97

So now I'm gonna show you another example. 98

98

So let's say you went back in time 99

99

and you went back to your fresh installation. 100

100

And then for some reason, 101

101

you wanted to go back to your updated state 102

102

to see if you can fix the issue. 103

103

If I suggested the solution 104

104

or if you read the solution online 105

105

and you want to go back to fix the issue 106

106

that you had after the update or for any other reason. 107

107

Maybe you just wanted to go back to a different state. 108

108

It wasn't an updated state. 109

109

I'm just giving an example with the update. 110

110

So if you want to go back to a future state, 111

111

you can still do that. 112

112

So all you have to do is just again. 113

113

Click on the updated. Click on the restore. 114

114

And we don't want to create a new snapshot 115

115

from the current state. 116

116

Because the current state is the updated state. 117

117

So we're gonna restore this. 118

118

Start the machine and you'll see 119

119

that we'll be back to the updated state 120

120

to where we had the new directory created. 121

121

So we're actually gonna go back in the future now. 122

122

And as you can see now, we have our test directory. 123

123

So we're back to the state where we updated the system. 124

124

So again. 125

125

As you can see, the snapshots can be really useful. 126

126

They can allow you to store bookmarks 127

127

or states of the operating system. 128

128

So you can actually have different configurations 129

129

and you can switch between them as you want.