需要修改2个文件：
/etc/hosts
/etc/sysconfig/network
然后重启
1、修改/etc/sysconfig/network
NETWORKING=yes
HOSTNAME=*******
2、修改/etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
127.0.0.1 *****
10.252.48.155 slave155
10.252.48.156 slave156
10.252.48.166 master166
关于/etc/hosts的更多内容，请参考http://blog.csdn.net/wzy_1988/article/details/8442853