I have a file oratab with entry like this
SCADAG:/esitst1/oracle/product/9.2.0.8:Y

I am trying to discover a way to change the 9.2.0.8 part of this to something like 10.2.0.4 as part of an upgrade script.

I have tried
cat /etc/oratab >>/tmp/oratab
ORACLE_HOME=/esitst1/oracle/product/9.2.0.8
export ORACLE_HOME
NEW_HOME=/esitst1/oracle/product/10.2.0.4
export New_HOME

sed -e "s/${ORACLE_SID}:${ORACLE_HOME}/${ORACLE_SID}:${NEW_HOME}/g" /tmp/oratab >/etc/oratab

If I read it correctly, it appears not to like the forward slashes.

Any suggestions as how to do this would be greatly appreciated. I may be even going down the wrong road here.

Thanks