Every time we publish a Linux hack that uses a shell script, someone will chime in ... The shell supports closures that you can assign to a variable to make what amounts to a function.

Shell scripts use variables to store data. Unlike many programming languages, variables in shell scripts don't have explicit data types. They are treated as strings, but arithmetic operations are ...

Linux Journal, representing 25+ years of publication, is the original magazine of the global Open Source community.

Ok, I can't script my way out of a papper bag ... P>The solution should be generic enough to handle any shell variable name, or any number of variables, and any number of occurances of each ...

It is easy to dismiss bash — the typical Linux shell program — as just a command prompt that allows scripting. Bash, however, is a full-blown programming language. I wouldn’t presume to tell ...

Dive into the world of Linux shell scripting with this hands-on guide. If you’re comfortable using the command line on Unix or Linux but haven’t fully explored Bash, this book is for you.

the debugging variable panel and scope-aware variable renaming. When working with scripts that contain lots of variables and logic, there always comes a time when debugging is necessary to figure ...

The shell script action has a few simple options ... separator by assigning a string with a comma as the value of the RS variable in a BEGIN block. Now we have to tease out every line that ...

Variables are just about the most ubiquitous element inside any PowerShell script. Variables can easily be created and referenced inside your script. But sometimes you just need to test to see if they ...