最小化安装CentOS 7.2.1511后，发现network启动打印不能加载ifcfg-lo文件的信息:
systemctl status -l network
...
Could not load file '/etc/sysconfig/network-scripts/ifcfg-lo'
...修改/etc/sysconfig/network-scripts/ifcfg-lo，追加如下一行
TYPE=LOOPBACK重启network.service，问题解决
systemctl restart network.service