A Bash script with options, commands and arguments
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
Create a bash script
script/commands.bashthat 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.Change permissions for the script by using the command
chmod 755 script/commands.bashYour script should end with the correct exit value.
Use a main function to start the program.
Structure the code into different functions.
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. |
- 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
- 1566259200: (A, lew) First edition.
