我刚刚在Oracle Linux 7.7上安装了Oracle 19c。 当我想启动sqlplus时，我收到command not found输出：

[oracle@localhost ~]$ sqlplus
bash: sqlplus: command not found...

这是日志文件...

[ 2019-12-15 20:16:37.939 EET ] Prepare for db operation 
DBCA_PROGRESS: 8%  
[ 2019-12-15 20:16:38.395 EET ] Copying database files
DBCA_PROGRESS : 31% 
[ 2019-12-15 20:18:36.737 EET ] Creating and starting Oracle instance 
DBCA_PROGRESS : 32% 
DBCA_PROGRESS : 36%
DBCA_PROGRESS : 40% 
DBCA_PROGRESS : 43% 
DBCA_PROGRESS : 46% 
[ 2019-12-15 20:29:54.876 EET ] Completing Database Creation
DBCA_PROGRESS : 51% 
DBCA_PROGRESS : 54% 
[ 2019-12-15 20:36:27.254 EET ] Creating Pluggable Databases 
DBCA_PROGRESS : 58% 
DBCA_PROGRESS : 77%
[ 2019-12-15 20:37:01.644 EET ] Executing Post Configuration actions
DBCA_PROGRESS : 100% 
[ 2019-12-15 20:37:01.654 EET ] Database creation complete. For details check the logfiles at: /opt/oracle/cfgtoollogs/dbca/ORCLCDB. 
Database Information: Global
Database Name:ORCLCDB System Identifier(SID):ORCLCDB

有人可以帮我吗？