Intro

Question 1

why one should write bash scripts

Question 2

do we have if else, loops, variables in basg

Answer 2

yes we do have ths things in bash

Question 3

is bash an software or programming language

Answer 3

it is not wrong to think that bash is an programming language

Question 4

is bash interpreter or shell

Answer 4

bash is both interpreter and shell as well

Question 5

what is an interpreter in linux, as shell or as bash

Question 6

what you need to follow along this course

Answer 6

computer
terminal

linux server or linux installation

spin up linux virtual machine or maybe a server

Question 7

what is bash

Answer 7

its a shell or a terminal

Question 8

what does shell do

Answer 8

shell allows to interact with system through commands

Question 9

what does mean by automation

Answer 9

as a administrator we have to execute lot of commands, but we dont want to do that

so we automate tasks

Question 10

why people use command lines to this date also

Answer 10

command line are vrey powerfull we can manage servers through commands only

Question 11

what are different shells available on linux

Answer 11

1. zsh
2. 3.
   4.

Question 12

which is the default shell on linux systems now a days

Answer 12

bash

Question 13

how to find which shell we are using

Answer 13

echo $SHELL

• this will tell us what shell we are using

Question 14

if we are not using bash then what to do

Answer 14

$ which bash
/usr/bin/bash

enter the following command then you are good to use bash

Question 15

what is bash script

Answer 15

script is text file, where one or more command are written / listed

Question 16

how to turn command into a script

Answer 16

create bash file with .sh extenstion
write command into it, like ls
execute the file

Question 17

how to properly write bash script

Answer 17

!/bin/bash => shee bang, first line

Question 18

part 3 | what are variables used for

Answer 18

to store information

Question 19

create myName variable and store value into it

Answer 19

$ myName = “swapnil”

Question 20

print this variable to terminal

Answer 20

$ echo $myName

Question 21

what does exit do

Answer 21

close entire window

Question 22

what is importance of session or window

Answer 22

when we close window, the variables previously are gone

Question 23

write variables in bash script

Answer 23

myname = “nil”
myage = “22”

echo “hello, my name is $myname”
echo “I’m $myage years old”

Question 24

can we use single quote for string

Answer 24

no we cant use single quotes for string

Question 25

what will happen if we use single quote and reference variable inside the string

Answer 25

output will be the name of variable itself…

Question 26

why we use variables

Answer 26

using variables help us to avoid retyping

example:

word = “awesome”

echo “linux is $word”
echo “I’m $word”