linux delete your oracle software

# userdel -r oracle
# groupdel dba

# touch /opt/rmoracle.sh
# vi /opt/rmoracle.sh
rm -rf /opt/oracle
rm -rf /opt/ORCLfmap
rm -f /etc/oraInst.loc
rm -f /etc/oratab
rm -f /usr/local/bin/oraenv
rm -f /usr/local/bin/coraenv
rm -f /usr/local/bin/dbhome

# chmod 755 /opt/rmoracle.sh
# /opt/rmoracle.sh