yup, that is good resource they are explained here: http://www.catonmat.net/series/awk-one-liners-explained http://www.catonmat.net/series/awk-one-liners-expla

yup, that is good resource they are explained here: http://www.catonmat.net/series/awk-one-liners-explained http://www.catonmat.net/series/awk-one-liners-explained which I mention it in further reading section