http://tech.idv2.com/2008/01/11/linux-sysinfo-cmds/
http://www.sunboyu.cn/category/original/apache-original
netstat -n | awk '/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}'
http://www.websina.com/bugzero/kb/unicode-bom.html