Linux 監控tcp連接數及狀態

查看tcp連接數狀態

root@pc:~# netstat -n | awk '/^tcp/ {++state[$NF]} END {for(key in state) print key,"\t",state[key]}'
SYN_RECV 	 5
CLOSE_WAIT 	 1
ESTABLISHED 	 1013
FIN_WAIT1 	 19
SYN_SENT 	 3
TIME_WAIT 	 131348

統計80端口上有多少個TCP連接

netstat -ant | grep 80 | wc -l

TCP連接中有多少個連接狀態是ESTABLISHED

netstat -ant | grep 80 | grep ESTABLISHED| wc -l

TCP連接中有多少個連接狀態是TIME_WAIT

netstat -ant | grep 80| grep TIME_WAIT| wc -l

TCP連接中有多少個連接狀態是TIME_WAIT (同时列出 IP）

netstat -nat | grep TIME_WAIT | grep ':80' | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -nr