You can install Oracle 19c in Linux Redhat version 9, while running the installer command…errors were thrown:
./runInstaller 
/u01/oracle/perl/bin/perl: error while loading shared libraries: libnsl.so.1: cannot open shared object file: No such file or directory
Solution:
There are missing library packages that requires instillation in your OS:
dnf install -y libnsl
dnf install -y libnsl.i686
dnf install -y libnsl2
dnf install -y libnsl2.i686
I Hope this helps…
My Final Post in 2023, weird issue was faced where a database system after Linux operating system reboot startups in a defect way. when you attempt to connect through Bequeath Protocol:
ERROR:
ORA-12547: TNS:lost contact
After investigation….The Solution:
cat /etc/oratab
current entry was the following:
ORCLCDB:/opt/oracle/product/19c/dbhome_1/:Y
changed it to:
ORCLCDB:/opt/oracle/product/19c/dbhome_1:Y
the extra ‘/‘ was causing the problem !
Typo’s can cause serious problems…it took some time to figure out the problem.
Geodata Master 