In the first installment of Command Line Basics, I explained the use of the echo command. In this first installment of Bash to Basics, I'll show how to use the echo command in a script.
Open up a text editor and paste the following text into it.
#!/bin/bash
# This is a demonstration of the echo commandecho Hello World!
echo This is my first bash program.
exit 0
Save it as a file called hello1 and exit the text editor.
We now need to make the file executable using the chmod command.
chmod +x hello1
You can now run the script program with the command
./hello1
Your output should look like
Hello World!
This is my first bash program.Congratulations! You just wrote a shell script.