One-liner introduction - Ruby one-liners cookbook

I assume you are already familiar with use cases where command line is more productive compared to GUI. See also this series of articles titled Unix as IDE.A shell utility like bash provides built-in commands and scripting features to make it easier to solve and automate various tasks. External *nix commands like grep, sed, awk, sort, find, parallel etc can be combined to work with each other. Depending upon your familiarity with those tools, you can either use ruby as a single replacement or complement them for specific use cases.Here's some one-liners (options will be explained later):.