CS/CE 218 Lecture -*-Outline-*- for text-filters

	lecture 1
* plumbing
	standard i/o, redirection, pipelines, filters

	lecture 2
* background
	running background processes, ps, job control

	lecture 3 (+ 1/2 for a quiz)
* text-manipulation
	examples of sort, wc, grep, tr, sed, cut, paste, diff, ...