When working with regular expressions in a shell script the norm is to use grep or sed or some other external command/program. Since version 3 of bash (released in 2004) there is another option: ...

From validating IP addresses to phone numbers, these are some of the handiest expressions in Boe's PowerShell toolbox. What are yours? As this article states, I want to show some of the regular ...

Here's the easy way to remember if you're using globbing (which is very simple) vs. regular expressions: globbing is done to filenames by the shell, and regex is used for searching text. The only ...