Chapter 12. Programming the Korn Shell
When commands are executed from within a file, instead of from the command line, the file is called a shell script and the shell is running noninteractively. Writing Korn shell scripts requires a few steps, as outlined in the following section.
The Steps in Creating a Shell Script
A shell script is normally written in an editor and consists of commands interspersed with comments. Comments are preceded by a pound sign (
The First Line
At the top left corner, the line preceded by
#! (often called shbang) indicates the program that will be executing the lines in the script. In Korn shell scripts, this ...