Chapter 3 Running Programs

3.1 Learning objectives

Run UNIX commands
Wrap UNIX commands in a Bash script
Make a Bash script executable
Run a Bash script

3.2 Run UNIX commands

Start a terminal

Run the ls -l command to list files (the -l is a command line argument that instructs the ls program to modify its operation so that longer details are provided about each file)

Run echo "Hello, World!" to print text to the terminal

3.3 Wrap commands in a Bash script

Create Text File

Write your first Bash script
- Add the following and save the file as 00-hello.sh

3.4 Run a Bash script

Now go back to the terminal:

Change to the workspace directory where you saved the file using the cd command

cd workspace/

Make the script executable using the chmod command. This command changes the file permissions to allow execution (+x) of the script as a program

chmod +x 00-hello.sh

Run the script by typing ./00-hello.sh in the terminal:

3.5 Summary

Congratulations! You have just:

Created a Bash script that prints “Hello, World!” to the terminal