vi editor tutorial from University of Hawaii

[Patrick Casey]

This site seems pretty good.
[url]http://www.eng.hawaii.edu/Tutor/vi.html[/url]

this one from Purdue I like better, a little easier for me to understand.
[url]https://engineering.purdue.edu/ECN/Support/KB/Docs/ViTextEditorTutorial/index_html[/url]