https://www.oreilly.com/library/view/unix-power-tools/0596003307/ https://www.oreilly.com/library/view/unix-power-tools/059600... I used this a great deal, whe

https://www.oreilly.com/library/view/unix-power-tools/0596003307/ https://www.oreilly.com/library/view/unix-power-tools/059600... I used this a great deal, when I first started out on serious UNIX tasks (1996+)