HPR3551: Bash snippet - some possibly helpful hints

Overview

I write a moderate number of Bash scripts these days. Bash is not a programming language as such, but it’s quite powerful in what it can do by itself, and with other tools it’s capable of many things.

I have enjoyed writing such scripts for many years on a variety of hardware and operating systems, and Bash is my favourite - partly because Linux itself is so flexible.

This is just a short show describing three things I tend to do in Bash scripts to assist with some tasks I find I need to undertake.

1. Generate Bash variables from a text file - usually output from a program
2. Fill Bash arrays with data from a file or other source
3. Use environment variables to control the Bash script’s execution

Long notes

Follow this link to read the detailed notes associated with this episode.

Links

• Various links:
  • What is the “eval” command in bash?
  • A Complete Guide on How To Use Bash Arrays
  • Bash mapfile builtin command
  • Bash manual 3.7.1 Simple Command Expansion

• Previous episodes in this series about arrays:
  • Bash Tips - 16
  • Bash Tips - 17
  • Bash Tips - 18
  • Bash Tips - 19
  • Bash Tips - 20

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