主要修改/etc/hosts配置文件。
修改前配置：
127.0.0.1??? localhost
192.168.2.50??? CCXFIT-DBSERVER

# The following lines are desirable for IPv6 capable hosts
::1???? localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts

修改后配置：