Big Data with Hadoop & Spark Training: http://bit.ly/2wLh5aF This CloudxLab Introduction to Linux helps you to understand Linux in detail. Below are the topics covered in this tutorial: 1) Linux Overview 2) Linux Components - The Programs, The Kernel, The Shell 3) Overview of Linux File System 4) Connect to Linux Console 5) Linux - Quick Start Commands 6) Overview of Linux File System

1. Introduction to Linux
Welcome to Introduction to Linux

2. Introduction to Linux
Linux Overview

3. Introduction to Linux
1. The programs
2. The kernel
3. The shell
Linux Operating System - Components

4. Introduction to Linux
Overview of Linux File System

5. Introduction to Linux
1. Using Web console
2. Using SSH clients for your operating system
Connect to Linux Console

6. Introduction to Linux
Let's go through the quickstart commands in Linux
Linux - Quickstart Commands

7. Introduction to Linux
https://cloudxlab.com/assessment/slide/linux-fundamenta
ls-for-big-data-data-science
Linux - Fundamentals

8. Introduction to Linux
● List files in your home directory in HDFS
hadoop fs -ls
OR
hadoop fs -ls /user/YOUR_USER_NAME
● Create “test” directory in your home directory in HDFS
hadoop fs -mkdir test
OR
hadoop fs -mkdir /user/YOUR_USER_NAME/test
CloudxLab - HDFS

9. Introduction to Linux
● Login to CloudxLab web console
● Type
whoami
● Above command is a program which will print the
username with the current effective user id
Linux Operating System - Programs - Example

10. Introduction to Linux
● A user executes programs.
● AngryBird is a program that gets executed by the
kernel,
● When a program is launched, it creates processes.
● Program or process will be used interchangeably.
Linux Operating System - Programs

11. Introduction to Linux
The Kernel handles the main work of an operating
system:
● Allocates time & memory to programs
● Handles File System
● Responds to various Calls
Linux Operating System - Kernel

12. Introduction to Linux
● A user interacts with the Kernel via the Shell.
● The console as opened in the previous slide is the
shell.
● A user writes instructions in the shell to execute
commands.
● Shell is also a program that keeps asking you to type
the name of other programs to run.
Linux Operating System - Shell - Example

13. Introduction to Linux
ls - Displays a list of files in the current working
directory, like the dir command in DOS
cd directory - Change directories
passwd - Change the password for the current user
file filename - Display file type of file with name
filename
cat textfile - Throws content of textfile on the screen
Linux - Quickstart Commands

14. Introduction to Linux
● Login to CloudxLab
● Click on “My Lab” and then click on “Lab Credentials” tab
● Click on “Web Console” (It will open a new window)
● Copy your lab username under “Lab Credentials” tab and paste
it in the newly opened window)
● Copy your lab password under “Lab Credentials” tab and paste
it in the newly opened window
● Press “Enter”
Connect to Linux Console - Web Console

15. Introduction to Linux
● Open “Terminal” or “shell” application in your system.
● Type
ssh your_lab_user_name@your_web_console_host
● Say your username is abhinav9884 and your web console host is
f.cloudxlab.com, please type
ssh abhinav9884@f.cloudxlab.com
● Copy paste your lab password when prompted
● Press Enter
Connect to Linux Console - using SSH

16. Introduction to Linux
● On a Linux system, everything is a file
● If something is not a file, it is a process
● A Linux system makes no difference between a file
and a directory, since a directory is just a file
containing names of other files.
● Programs, services, texts, images, and so forth, are all
files. Input and output devices, and generally all
devices, are considered to be files, according to the
system.
Overview of Linux File System

17. Introduction to Linux
● Linux is an operating system
● Linux runs most of the internet today.
● Linux is free to use.
● Linux was designed considering UNIX compatibility
Linux Overview