Book Image

Mastering Linux Shell Scripting - Second Edition

By : Mokhtar Ebrahim, Andrew Mallett
5 (1)
Book Image

Mastering Linux Shell Scripting - Second Edition

5 (1)
By: Mokhtar Ebrahim, Andrew Mallett

Overview of this book

In this book, you’ll discover everything you need to know to master shell scripting and make informed choices about the elements you employ. Grab your favorite editor and start writing your best Bash scripts step by step. Get to grips with the fundamentals of creating and running a script in normal mode, and in debug mode. Learn about various conditional statements' code snippets, and realize the power of repetition and loops in your shell script. You will also learn to write complex shell scripts. This book will also deep dive into file system administration, directories, and system administration like networking, process management, user authentications, and package installation and regular expressions. Towards the end of the book, you will learn how to use Python as a BASH Scripting alternative. By the end of this book, you will know shell scripts at the snap of your fingers and will be able to automate and communicate with your system with keyboard expressions.
Table of Contents (17 chapters)

Questions

  1. How many lines will be printed on screen from the following script?
#!/bin/bash 
for (( v1 = 12; v1 <= 34; v1++ )) 
do 
echo "$v1" 
done > output 
  1. How many lines will be printed on the screen from the following script?
#!/bin/bash 
for (( v=8; v <= 12; v++ )) 
do 
if [ $v -ge 12 ] 
then 
break 
fi 
echo "$v" 
done 
  1. What is wrong with the following script? And how can you fix it?
#!/bin/bash 
for (( v=1, v <= 10, v++ )) 
do 
echo "value is $v" 
done 
  1. How many lines will be printed on the screen from the following script?
#!/bin/bash 
count=10 
while (( count >= 0 )) ; do 
echo $count 
done 
$((count--)) 
exit 0