1.檢視端口占用情況

netstat -ntlp|grep 埠

$netstat -ntlp|grep 7100
$tcp6       0      0 :::7100                 :::*                    LISTEN      155045/./appserver

2.檢視某個埠的連線數

netstat -antlp |grep 埠號 |wc -l

$netstat -antlp |grep 9100 |wc -l
$299

3.檢視某個埠連線狀態數

檢視ESTABLISHED狀態數目

netstat -nat | grep -i "9100" |grep  ESTABLISHED | wc -l

$netstat -nat | grep -i "9100" |grep  ESTABLISHED | wc -l
$257

檢視TIME_WAIT 狀態數目

netstat -nat | grep -i "9100" |grep  TIME_WAIT | wc -l

$netstat -nat | grep -i "9100" |grep  TIME_WAIT | wc -l
$12