Hello to all
I realized that I had written ORACLE_HOSTNAME environment variable wrong to the computer whose host name (in /etc/hosts) was correct
after installed the SW and patched it (19c)
2) I changed the variable in my environment
3) done shutdown db
4) done reboot server
5) now creating listener and tnsnames.ora I have the right hostname inside it (I had do this by netca)
My question is:
should I reinstall all the sw or changed the variable everything alla is ok now?
19c
Thanks in advance