TIL in sh, you can press C-w to delete previous word and C-u to delete the whole line.

A nice showcase of powershell features.

Tips on writing bash scripts that can be run repeatedly.

The author advocates the syntax my_func() ( body ... ) over my_func() { body ... } syntax for its additional scoping benefits. I never knew bash function can be defined this way, and it's certainly a great read.

<blockquote>TL;DR Awk crunches massive data; a High Performance Computing (HPC) script calls hundreds of Awk concurrently. Fast and scalable in-memory solution on a fat machine.</blockquote>