rm -rf /app/oracle/base/admin/*
rm -rf /app/oracle/base/dbs/*
rm -rf /app/oracle/base/homes/*/dbs/*

rm -rf /app/oracle/product/11.2/dbs/*
rm -rf /app/oracle/product/12.1/dbs/*
rm -rf /app/oracle/product/12.2/dbs/*
rm -rf /app/oracle/product/19/dbs/*
rm -rf /app/oracle/product/21/dbs/*

rm -rf /data/*
rm -rf /reco/*

rm -rf /home/oracle/oradiag_oracle
rm -rf /app/oracle/base/homes/OraDB19Home1/network/admin/*

> /etc/listener.ora
> /etc/tnsnames.ora