Cloud Basics and Linux

Question 1

historical events

Answer 1

1974: A Protocol for Packet Network TCPprotocol

1990s: Introduction of web, virtual web hosting, web-based email, file storage

1994: Amazon.com

1998: VMwarefounded

2010: OpenStack

2013: Docker

Question 2

What is Cloud Computing?

Answer 2

is a model for enabling ubiquitous, convenient, on-demand network access to a shared pool of configurable computing resources (e.g., networks, servers, storage, applications, and services) that can be rapidly provisioned and released with minimal management effort or service provider interaction.

Question 3

What are the 5 concepts of cloud computing?

Answer 3

• IT Resource
• On-Premise
• Cloud
• Cloud Provider
• Cloud Consumer

Question 4

What is a CLI?

Answer 4

Command Line Interface, typically called a shell.

LXTerminal is a CLI, user interacts with computer via a shell.

Question 5

What does CAT stand for with commands?

Answer 5

concatenate one or more files

Question 6

What does UID and GID mean? what is the account number?

Answer 6

• USER & GROUP IDENTIFICATION NUMBER (0)

Question 7

System accounts can have different home folders, what might a mail account be?

Answer 7

/var/spool/mail

Question 8

What is Virtualisation?

Answer 8

Virtualization is the process of running a virtual instance of a computer system in a layer seperated from the actual hardware

Benefits;

It reduce the number of servers needed

Over allocation (new) ‘vs’ static allocation (old) RAM

can move instances based on resources automatically

Question 9

What is a hypervisor? how many types are there?

Answer 9

A hypervisor is computer software, firmware or hardware that creates and runs virtual machines

Type 1 hypervisor: hypervisors run directly on the system hardware – A “bare metal” embedded hypervisor,

Type 2 hypervisor: hypervisors run on a host operating system that provides virtualization services, such as I/O device support and memory management.