root@VIP:/etc/mysql# netstat -ap | grep 3306
root@VIP:/etc/mysql# netstat -ap | grep mysql
tcp 0 0 0.0.0.0:mysql 0.0.0.0:* LISTEN 904/mysqld
tcp 0 0 localhost:41978 localhost:mysql ESTABLISHED 28195/python
tcp 0 0 localhost:mysql localhost:41978 ESTABLISHED 904/mysqld
unix 2 [ ACC ] 流 LISTENING 23947 904/mysqld /var/run/mysqld/mysqld.sock
—— 怎么看3306端口是否被开启