The information contained in the oratab should always be updated, but it is not always reliable. If you want to know what Oracle installations you have in a server, better to get it from the Oracle Universal Installer or, if you want some shortcuts, do some grep magics inside the inventory with the shell.
The following diagram is a simplified structure of the inventory that shows what entries are present in the central inventory (one per server) and the local inventories (one per Oracle Home).
You can use this simple function to get some content out of it, including the edition (that information is a step deeper in the local inventory).
# [ oracle@testlab:/u01/app/oracle/ [17:53:48] [12.1.0.2.0 EE SID=theludot] 0 ] #
# type lsoh
lsoh is a function
lsoh ()
{
CENTRAL_ORAINV=`grep ^inventory_loc /etc/oraInst.loc | awk -F= '{print $2}'`;
IFS='
';
echo;
printf "%-22s %-55s %-12s %-9s\n" HOME LOCATION VERSION EDITION;
echo ---------------------- ------------------------------------------------------- ------------ ---------;
for line in `grep "<HOME NAME=" ${CENTRAL_ORAINV}/ContentsXML/inventory.xml 2>/dev/null`;
do
unset ORAVERSION;
unset ORAEDITION;
OH=`echo $line | tr ' ' '\n' | grep ^LOC= | awk -F\" '{print $2}'`;
OH_NAME=`echo $line | tr ' ' '\n' | grep ^NAME= | awk -F\" '{print $2}'`;
comp_file=$OH/inventory/ContentsXML/comps.xml;
comp_xml=`grep "COMP NAME" $comp_file | head -1`;
comp_name=`echo $comp_xml | tr ' ' '\n' | grep ^NAME= | awk -F\" '{print $2}'`;
comp_vers=`echo $comp_xml | tr ' ' '\n' | grep ^VER= | awk -F\" '{print $2}'`;
case $comp_name in
"oracle.crs")
ORAVERSION=$comp_vers;
ORAEDITION=GRID
;;
"oracle.sysman.top.agent")
ORAVERSION=$comp_vers;
ORAEDITION=AGT
;;
"oracle.server")
ORAVERSION=`grep "PATCH NAME=\"oracle.server\"" $comp_file 2>/dev/null | tr ' ' '\n' | grep ^VER= | awk -F\" '{print $2}'`;
ORAEDITION="DBMS";
if [ -z "$ORAVERSION" ]; then
ORAVERSION=$comp_vers;
fi;
ORAMAJOR=`echo $ORAVERSION | cut -d . -f 1`;
case $ORAMAJOR in
11 | 12)
ORAEDITION="DBMS "`grep "oracle_install_db_InstallType" $OH/inventory/globalvariables/oracle.server/globalvariables.xml 2>/dev/null | tr ' ' '\n' | grep VALUE | awk -F\" '{print $2}'`
;;
10)
ORAEDITION="DBMS "`grep "s_serverInstallType" $OH/inventory/Components21/oracle.server/*/context.xml 2>/dev/null | tr ' ' '\n' | grep VALUE | awk -F\" '{print $2}'`
;;
esac
;;
esac;
[[ -n $ORAEDITION ]] && printf "%-22s %-55s %-12s %-9s\n" $OH_NAME $OH $ORAVERSION $ORAEDITION;
done;
echo
}
# [ oracle@testlab:/u01/app/oracle/sbin [17:53:48] [12.1.0.2.0 EE SID=theludot] 0 ] #
# lsoh
HOME LOCATION VERSION EDITION
---------------------- ------------------------------------------------------- ------------ ---------
OraHome12C /u01/app/oracle/product/12.1.0.2 12.1.0.2.0 DBMS EE
OraDb11g_home1 /u01/app/oracle/product/11.2.0.4 11.2.0.4.0 DBMS EE
OraGI12Home1 /u01/app/grid/product/grid 12.1.0.2.0 GRID
agent12c1 /u01/app/oracle/product/agent12c/core/12.1.0.5.0 12.1.0.5.0 AGTHTH