1. CentOS 6 修改主机名

      1. [root@centos6 ~]$ hostname # 查看当前的hostnmae
      2. centos6.magedu.com
      3. [root@centos6 ~]$ vim /etc/sysconfig/network # 编辑network文件修改hostname行(重启生效)
      4. [root@centos6 ~]$ cat /etc/sysconfig/network # 检查修改
      5. NETWORKING=yes
      6. HOSTNAME=centos66.magedu.com
      7. [root@centos6 ~]$ hostname centos66.magedu.com # 设置当前的hostname(立即生效)
      8. [root@centos6 ~]$ vim /etc/hosts # 编辑hosts文件,给127.0.0.1添加hostname
      9. [root@centos6 ~]$ cat /etc/hosts # 检查
      10. 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 centos66.magedu.com
      11. ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
    2. CentOS 7 修改主机名

      1. [root@centos7 ~]$ hostnamectl set-hostname centos77.magedu.com # 使用这个命令会立即生效且重启也生效
      2. [root@centos7 ~]$ hostname # 查看下
      3. centos77.magedu.com
      4. [root@centos7 ~]$ vim /etc/hosts # 编辑下hosts文件, 给127.0.0.1添加hostname
      5. [root@centos7 ~]$ cat /etc/hosts # 检查
      6. 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 centos77.magedu.com
      7. ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6