unix-good websites

https://www.youtube.com/watch?v=k0emVEP-TTw

http://www.kellogg.northwestern.edu/rc/docs/BasicUnixandSAS.pdf

http://logtail.blogspot.com/2007/04/how-to-search-logs-using-grep-part-1.html

http://manuals.its.virginia.edu/unixtut/index.html