If you're working with a large amount of data in your Bash scripts, arrays will make your life a lot easier. Some people get intimidated by the syntax. But once learned, it will make your scripts more ...

An associative array is an array which uses strings as indices instead of integers. To see how associative arrays work, we’re going to look at both the Korn shell and Perl, though only the newest ...

In Bash, a hash is a data structure that can contain many sub-variables, of the same or different kinds, but indexes them with user-defined text strings, or keys, instead of fixed numeric identifiers.

Creating a sed-based file substitution tool. A few weeks ago, I was digging through my spam folder and found an email message that started out like this: Dear #name# Congratulations on winning the $15 ...