环境CentOS 7.5 Oracle 11.2.0.4 RAC
故障：
在grid安装过程执行root.sh脚本时报错
firstnode configuration failed at /u01/app/11.2.0/grid/crs/install/crsconfig_lib.pm line 9379
firstnode configuration failed at /u01/app/11.2.0/grid/crs/install/crsconfig_lib.pm line 7599
处理方法：
查看每个节点的hostname是否与/etc/hosts中public host主机名一致