1、host文件原内容
cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.10.21 db redis
192.168.10.22 es
192.168.10.23 spark kafka zookeeper
192.168.10.24 tomcat flume
2、去
