User-agent: *
Disallow: /

User-Agent: NaverBot
Disallow: /

User-Agent: Googlebot-Image
Disallow: /

User-Agent: Yahoo-MMCrawler
Disallow: /

User-Agent: wisebot
Disallow: /

[root@www www]# more robot.txt
User-agent: *
Disallow: /

User-agent: NaverBot
Disallow: /