A Bash script with options, commands and arguments

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You will create a bash script that handles options and arguments.

#Prerequisites

You have completed the exercise “Skapa Bash-skript med options, command och arguments”.

You have read the course literature and acquired basic knowledge about bash. You’ve done the task “bash2”.

#Introduction

You will create your own commands.bash script that receives options and arguments. The script can use built-in bash functions.

TIPS. Use the guide if you get stuck. Learn to use the manual man.

#Requirement

  1. Create a bash script script/commands.bash that can receive options and arguments. If your script is called without options or arguments, the script should print that you can get help by using --help, -h.

  2. Change permissions for the script by using the command chmod 755 script/commands.bash

  3. Your script should end with the correct exit value.

  4. Use a main function to start the program.

  5. Structure the code into different functions.

  6. The following options should work:

Option What should happen
-h, --help Print a help text on how to use the program.
-v, --version Displays the current version of the program.
  1. The following arguments should work:
Argument                                                  Vad skall hända
cal Print a calendar.
greet Print a greeting phrase to the current user.
loop <min> <max> Print the numbers between <min> and <max> using a forloop.
lower <n n n...> Print all numbers less than 42. The amount of numbers passed should not matter.
reverse <random sentence> Print a sentence backwards (ecnetnes modnar).
all Run all functions consecutively. The values ​​you choose yourself. Please work on getting a nice presentation.

Validate your commands.bash script by doing the following commands in the course directory in the terminal.

# Flytta till kurskatalogen
$ dbwebb validate script

Correct any errors that pop up and publish again. When it looks green you are done.

#Revision history

  • 2019-08-20: (A, lew) First edition.

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