统计一些网络信息
netstat -an|awk '/^tcp/{++S[$NF]}END{for (a in S)print a,S[a]}'
TIME_WAIT 191
CLOSE_WAIT 9
FIN_WAIT1 254
FIN_WAIT2 79
ESTABLISHED 4435
SYN_RECV 87
CLOSING 4
LAST_ACK 310
LISTEN 6