摘要：
curl -0 'http://ftp.apnic.net/apnic/stats/apnic/delegated-apnic-latest' | grep ipv4 | grep CN | awk -F\| '{ printf("%s/%d\n", $4, 32-log($5)/log(2)) } 阅读全文
摘要：
Here's quick way to remove all entries in the host file:In an OSX terminal, type rm -f ~/.ssh/known_hosts 阅读全文