netstat -tnlp 裡面protocal 為什麼有的是tcp 有的是tcp6?
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 10.20.30.175:3306 0.0.0.0:* LISTEN 7253/mysqld
tcp 0 0 0.0.0.0:28017 0.0.0.0:* LISTEN 17767/mongod
tcp 0 0 0.0.0.0:54897 0.0.0.0:* LISTEN 1004/sshd
tcp 0 0 0.0.0.0:27017 0.0.0.0:* LISTEN 17767/mongod
tcp6 0 0 :::9999 :::* LISTEN 18498/java
tcp6 0 0 127.0.0.1:8079 :::* LISTEN 1143/java
tcp6 0 0 :::8080 :::* LISTEN 18498/java
tcp6 0 0 :::54897 :::* LISTEN 1004/sshd
tcp6 0 0 :::22133 :::* LISTEN 975/java
tcp6 0 0 :::8983 :::* LISTEN 1143/java
《解決方案》
我發現ubuntun 10.04就會有這個
centos 裡面protocal 就只有 tcp,
這是為什麼呢 ?