If you can enter commands into the shell, you can write shell scripts. A shell script (also known as a Bourne shell script) is a series of commands written in a file; the shell reads the commands from the file just as it would if you typed them into a terminal.
11.1 Shell Script Basics
Bourne shell scripts generally start with the following line, which indicates that the /bin/sh program should execute the commands in the script file. (Make sure that there’s no whitespace at the beginning of the script file.)
#!/bin/sh
The #! part is called a shebang; you’ll see it in other scripts in this book. You can ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month, and much more.
