Discussion:Awk

• http://backreference.org/2010/02/10/idiomatic-awk/
• http://www.catonmat.net/blog/ten-awk-tips-tricks-and-pitfalls/
• http://backreference.org/2010/04/17/csv-parsing-with-awk/
• http://www.joeldare.com/wiki/using_awk_on_csv_files

awk '$9 == "404" {print $7}' www.bricosoft.com-access.log |sort|uniq -c|sort -rn| head -n 50