Book Image

Linux Shell Scripting Essentials

By : Sinny Kumari, Khem Raj
Book Image

Linux Shell Scripting Essentials

By: Sinny Kumari, Khem Raj

Overview of this book

Table of Contents (15 chapters)
Linux Shell Scripting Essentials
About the Author
About the Reviewers

Switch to my choice

Switch is used to jump and run a certain case as per the result of the condition or expression is evaluated. It acts as an alternative to using multiple if in bash and keeps bash script much clear and readable.

The syntax of switch is as follows:

case $variable in
  # Tasks to be executed
  # Tasks to be executed
  pattern n)
  # Tasks to be executed

In syntax, $variable is the expression or value that needs to be matched among the list of choices provided.

In each choice, a pattern or a combination of patterns can be specified. The ;; tells bash that end of given choice block. The esac keyword specify end of case block.

The following is an example to count the number of files and directories in a given path:

# Filename:
# Description: Using case to find count of directories and files in a # path

echo "Enter target path"
read path

for file in 'ls -l $path | cut -d '...