Yup.. that's it..

just open notepad enter
Code:
User-agent: *
Disallow: /
and save as robots.txt

as you could have read in link [3] in sec_ware's post

And the host doesn't matter.. geocity's or some realy 1337 hosting provider..
Should all work..

Note. . a robots.txt file doesn't actualy protect you from mallicious bots.. It does however stop legitimate (google, msn, archive.org etc) bots from indexing you..

Even more on the robots.txt here: http://www.robotstxt.org/