The tutorial that helped me is "sed" based: http://www.gentoo.org/doc/en/articles/l-sed1.xml http://www.gentoo.org/doc/en/articles/l-sed1.xml Also, an online r

The tutorial that helped me is "sed" based: http://www.gentoo.org/doc/en/articles/l-sed1.xml http://www.gentoo.org/doc/en/articles/l-sed1.xml Also, an online regex tester may be helpful: http://regexpal.com/ http://regexpal.com/