问题：
SQL> startup
ORA-01078: failure in processing system parameters
LRM-00109: could not open parameter file '/u01/app/oracle/product/19.16.0/db_1/dbs/initorcl.ora'
解决：cp /u01/app/oracle/product/19.16.0/db_1/dbs/init.ora /u01/app/oracle/product/19.16.0/db_1/dbs/initorclcdb.ora
问题：
SQL> startup
ORA-09925: Unable to create audit trail file
Linux-x86_64 Error: 2: No such file or directory
Additional information: 9925
解决：
cd $ORACLE_HOME/dbs
vi initorcl.ora
# audit_file_dest='<ORACLE_BASE>/admin/orcl/adump'
audit_file_dest='/u01/app/oracle/admin/orcl/adump'
# db_recovery_file_dest='<ORACLE_BASE>/fast_recovery_area'
db_recovery_file_dest='/u01/app/oracle/fast_recovery_area'
问题：
Middleware Home Location: /u01/app/oracle/product/middleware Specified Oracle Middleware Home location does not have write permissions.
Agent Base directory: /u01/app/oracle/product/agent You have entered an agent base directory location that does not have write permission.
解决：
chown -R oracle:oinstall /u01/app/oracle
chmod -R 775 /u01/app
问题：
Unable to proceed with the installation. The location you have specified does not have sufficient disk space to install Enterprise Manager Cloud Control.
Free some disk space in this location or specify another location that has sufficient space.
Location: /u01/app/oracle/product/middleware , /u01/app/oracle/product/gc_inst , null
Disk Space Required : 37.3 GB
Disk Space Available : 18.3 GB