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Linux > Lesson 3 - A > Flashcards

Lesson 3 - A Flashcards

1
Q

What is a computer network?

A

it is two or more computers connected together and sharing data

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2
Q

What is OSI model?

A

The OSI model is a standard for communication between computers

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3
Q

what is OSI stand for?

A

(Open Systems Interconnection

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4
Q

What does Open source mean ?

A

Free, and we can modify

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5
Q

What are the parts of a computer?

A

hardware and software

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6
Q

What are the 3 big hardware of the computer

A

RAM, CPU, Harddrive

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7
Q

When we have a hardware, what will we need to put on it, to enable any user to use it?

A

OS (operating system)

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8
Q

What are some OS that exist?

A

mac, windows, …

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9
Q

What do you add on a OS in order to use a computer ?

A

applications

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10
Q

What are the 3 layers of a computer

A

OS, hardware, applications ( also call infrastructure)

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11
Q

What is the cloud provider?

A
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12
Q

Example of cloud provider?

A

Alibaba, oracle, GPC, digital OCEAN, Linode ..

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13
Q

What is the role of the load balancer ?

A

distribute traffic amount the server that are behind

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14
Q

What is the Linux kernel? The core

A

foundation of the OS

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15
Q

What is the common point among the Linux flavors?

A

They have the same kernel

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16
Q

What are the components of Linux?

A

shell, the kernel, the application, the libraries, the CLI …

17
Q

What does CLI stand for?

A

Command Line Interface

18
Q

What is the command you use to connect remotely to a Linux machine?

A

SSH Command

19
Q

What does SSH stand for?

A

Secure shell

20
Q

You can use ssh to connect to a server, located in China even if you are in France, true or false?

A

TRUE

21
Q

What are the 2 differents ways to connect to a server?

A

username and password and user name and key pair

22
Q

Why should we have to use a key to connect to a server with AWS?

A

security ( the password can be easily breakable by a hacker)

23
Q

LAB: lunch a server and do an inventory:
- memory,
- OS,
- the size of memory is still available,
- when was the last time the server reboted?
- What is the cpu speed?
- How many hardrive do we have on it?

A

Linux (4 decks)

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