Hello Friends,
I am trying to install Oracle Database 19c on ubuntu machine Ubuntu 20.04.3 LTS , however during the installation i am getting a message that this OS is not supported.

However i continued and there were a few errors in linking libraries, yet the installation proceeded fine.
However database was not successfully created it appears when i do
ps-ef | grep ORCL
or try to login from sqldeveloper/sql
Now when i execute the runinstaller it is not allowing me to create again it gives the following message

I am also not able to uninstall the database using deinstall script. I get the error
## [START] Install check configuration ##
Checking for existence of the Oracle home location /home/ron/oracle19_3db
Oracle Home type selected for deinstall is: Oracle Single Instance Database
Oracle Base selected for deinstall is: /home/ron/oracledbhome
Checking for existence of central inventory location /home/ron/oraInventory
## [END] Install check configuration ##
Network Configuration check config START
Network de-configuration trace file location: /tmp/deinstall2023-03-15_04-24-49AM/logs/netdc_check2023-03-15_04-25-02AM.log
UnsatisfiedLinkError exception loading native library: njni19
java.lang.UnsatisfiedLinkError: /tmp/deinstall2023-03-15_04-24-49AM/lib/libnjni19.so: /tmp/deinstall2023-03-15_04-24-49AM/lib/libclntshcore.so.19.1: file too short
ERROR: oracle.net.common.NetGetEnv.get(Ljava/lang/String;)Ljava/lang/String;
Please tell me how to proceed with the installation.