DD-WRT Optware

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http://forums.anandtech.com – I am reading about installing Optware into a router and have read that if I want to modify the Asiablock IP addresses I need to use VI editor. What is VI editor and how do I use it? This is what I'm reading. http://www.dd-wrt.com/wiki/index.php...etting_Started I'm a Linux noob. Here is the relevant info I read that doesn't explain how to use VI. It just says search the Internet. I don't won't to block Australia, but I do want to add countries. Quote: Countries that are blocked by default are: cn = China af = Afghanistan au = Australia pk = Pakistan in (Hardware)