[root@dttchat2 systemd]# systemctl disable oracle-ohasd.service
Removed symlink /etc/systemd/system/multi-user.target.wants/oracle-ohasd.service.
Removed symlink /etc/systemd/system/graphical.target.wants/oracle-ohasd.service.
[root@dttchat2 systemd]# systemctl enable oracle-ohasd.service
Created symlink from /etc/systemd/system/multi-user.target.wants/oracle-ohasd.service to /etc/systemd/system/oracle-ohasd.service.
Created symlink from /etc/systemd/system/graphical.target.wants/oracle-ohasd.service to /etc/systemd/system/oracle-ohasd.service.
[root@dttchat2 systemd]#
RAC OCR参数修改！
/u01/app/12.2.0/grid/bin/crsctl modify res ora.dtt.db -attr "USR_ORA_INST_NAME@SERVERNAME(dttchat1)=dtt_1" -unsupported
/u01/app/12.2.0/grid/bin/crsctl modify res ora.dtt.db -attr "USR_ORA_INST_NAME@SERVERNAME(dttchat2)=dtt_2" -unsupported
/u01/app/12.2.0/grid/bin/crsctl modify res ora.dtt.db -attr "USR_ORA_INST_NAME@SERVERNAME(dttchat2)=dtt_2" -unsupported
原文：https://www.cnblogs.com/huangguanyuan/p/12310740.html