>I'd have to throw most of the standard UNIX utils in there: grep, awk, cut, sed, sort, uniq, and of course, vim. Agreed. I'd just add that there are many more

>I'd have to throw most of the standard UNIX utils in there: grep, awk, cut, sed, sort, uniq, and of course, vim. Agreed. I'd just add that there are many more tools along the same lines (just have to look in the various bin directories, and not to forget custom ones that people write in C / shell / other languages and combinations of the same), and that it is how they work together - because of a few powerful key concepts like pipes, I/O redirection, file wildcards, the various metacharacters starting with $ and others - that really makes the system powerful, more than any individual tool, though those play a part too.