centos7配置host

1. 修改主机名称

• hostnamectl
  
• 修改主机名 hostnamectl set-hostname 新的主机名称

2. 配置虚拟机的hosts
   方便虚拟机之间的通信

• vim /etc/hosts

127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.181.100 hadoop100
192.168.181.101 hadoop101
192.168.181.102 hadoop102
192.168.181.103 hadoop103
192.168.181.104 hadoop104

3. 配置本地的hosts
   方便远程操控虚拟机