Notes for installing Oracle 19c RPM on OraLinux 7
1) Check full_hostname in nano /etc/hostname
2) Before run configure add server to /etc/hosts (#ipadrress hostname short_hostname)
Afer installing&configure:
3) set password for oracle OS user
4) Login as oracle su - oracle
5) export ORACLE_HOME=/opt/oracle/product/19c/dbhome_1
6) export ORACLE_SID=ORCLCDB
7) $ORACLE_HOME/bin/sqlplus / as sysdba
sdmrnv [2.45ms]