Shell Scripting

Cut Command in Linux With Examples

Extracting Text with cut The cut command extracts columns of text from a text file or stream. Imagine taking a sheet of …

Conditional Structures Simple shell scripts represent a collection of commands that are executed from beginning to end. …

Using exit codes within a script After a script has processed all of its contents, it exits to the process that called …

Using for loop to iterate commands System administrators often encounter repetitive tasks in their day-to-day …

Although you cannot use any positional parameter name on the left side of an assignment statement, you can still assign …

Functions in the Shell A function is a set of one or more statements that act as a complete routine. Each function must …

Understanding “$@” and “$*” Positional Parameters in Shell Script The Values of the …

Korn Shell Arrays Arrays are variables that contain more than one value. Don’t declare arrays explicitly or explicitly …

Processing Script Options With the getopts Statement Options or switches are single-letter characters preceded by a + …

Variable Types In the Bourne shell, there are two variable types: strings and constants. In the Korn shell, there are …

The “here” Document Frequently, a script might call on another script or utility that requires input. To run a script …