[root@localhost ~]# cat /etc/hosts
127.0.0.1  localhost localhost.localdomain localhost4 localhost4.localdomain4
::1     localhost localhost.localdomain localhost6 localhost6.localdomain6
10.0.0.11 study1.localdomain study1
[root@localhost ~]# cat /etc/hostname
study1.localdomain

[root@study1 /]# yum -y install oracle-database-preinstall-19c
Loaded plugins: langpacks, ulninfo
ol7_UEKR5                                                                                            | 2.5 kB 00:00:00  
ol7_latest                                                                                            | 2.7 kB 00:00:00  
(1/4): ol7_UEKR5/x86_64/updateinfo                                                                                | 49 kB 00:00:01  
(2/4): ol7_latest/x86_64/updateinfo                                                                               | 1.1 MB 00:00:05  
(3/4): ol7_UEKR5/x86_64/primary_db                                                                                | 5.7 MB 00:00:27  
(4/4): ol7_latest/x86_64/primary_db                                                                               | 19 MB 00:01:21  
Resolving Dependencies
(many more lines supressed)
Installed:
 oracle-database-preinstall-19c.x86_64 0:1.0-1.el7                                                                                  
Dependency Installed:
 compat-libcap1.x86_64 0:1.10-7.el7  compat-libstdc++-33.x86_64 0:3.2.3-72.el7  glibc-devel.x86_64 0:2.17-292.0.1.el7    glibc-headers.x86_64 0:2.17-292.0.1.el7  kernel-headers.x86_64 0:3.10.0-1062.el7 
 ksh.x86_64 0:20120801-139.0.1.el7   libaio-devel.x86_64 0:0.3.109-13.el7     libstdc++-devel.x86_64 0:4.8.5-39.0.1.el7 
Dependency Updated:
 glibc.x86_64 0:2.17-292.0.1.el7                   glibc-common.x86_64 0:2.17-292.0.1.el7                   libstdc++.x86_64 0:4.8.5-39.0.1.el7                  
Complete!
[root@study1 /]#

[root@study1 /]# curl -o oracle-database-preinstall-19c-1.0-1.el7.x86_64.rpm https://yum.oracle.com/repo/OracleLinux/OL7/latest/x86_64/getPackage/oracle-database-preinstall-19c-1.0-1.el7.x86_64.rpm
 % Total  % Received % Xferd Average Speed  Time  Time   Time Current
                 Dload Upload  Total  Spent  Left Speed
100 18204 100 18204  0   0 18037   0 0:00:01 0:00:01 --:--:-- 18059
[root@study1 /]# yum -y localinstall oracle-database-preinstall-19c-1.0-1.el7.x86_64.rpm

[root@study1 db]# yum -y localinstall oracle-database-ee-19c-1.0-1.x86_64.rpm
Loaded plugins: langpacks, ulninfo
Examining oracle-database-ee-19c-1.0-1.x86_64.rpm: oracle-database-ee-19c-1.0-1.x86_64
Marking oracle-database-ee-19c-1.0-1.x86_64.rpm to be installed
Resolving Dependencies
--> Running transaction check
---> Package oracle-database-ee-19c.x86_64 0:1.0-1 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
========================================================================================================================================================================================================================
 Package                         Arch                   Version                 Repository                               Size
========================================================================================================================================================================================================================
Installing:
 oracle-database-ee-19c                  x86_64                  1.0-1                  /oracle-database-ee-19c-1.0-1.x86_64                  6.9 G
Transaction Summary
========================================================================================================================================================================================================================
Install 1 Package
Total size: 6.9 G
Installed size: 6.9 G
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
 Installing : oracle-database-ee-19c-1.0-1.x86_64                                                                                 1/1
[INFO] Executing post installation scripts...
[INFO] Oracle home installed successfully and ready to be configured.
To configure a sample Oracle Database you can execute the following service configuration script as root: /etc/init.d/oracledb_ORCLCDB-19c configure
 Verifying : oracle-database-ee-19c-1.0-1.x86_64                                                        1/1
Installed:
 oracle-database-ee-19c.x86_64 0:1.0-1                                                            
Complete!
[root@study1 db]#
oracle_home目录是/opt/oracle/product/19c/dbhome_1

[root@study1 dbhome_1]# /etc/init.d/oracledb_ORCLCDB-19c configure
Configuring Oracle Database ORCLCDB.
Prepare for db operation
8% complete
Copying database files
31% complete
Creating and starting Oracle instance
32% complete
36% complete
40% complete
43% complete
46% complete
Completing Database Creation
51% complete
54% complete
Creating Pluggable Databases
58% complete
77% complete
Executing Post Configuration Actions
100% complete
Database creation complete. For details check the logfiles at:
 /opt/oracle/cfgtoollogs/dbca/ORCLCDB.
Database Information:
Global Database Name:ORCLCDB
System Identifier(SID):ORCLCDB
Look at the log file "/opt/oracle/cfgtoollogs/dbca/ORCLCDB/ORCLCDB.log" for further details.
 
Database configuration completed successfully. The passwords were auto generated, you must change them by connecting to the database using 'sqlplus / as sysdba' as the oracle user.
[root@study1 dbhome_1]#