runon_allpdbs_show_conname.sh

#!/usr/bin/bash

ORACLE_HOME=/u02/app/oracle/product/19.0.0.0/dbhome_1

for v_inst in `ps -ef| grep pmon | awk '{print $8}' | grep -iv asm | grep -iv apx | awk -F"_" '{print $3}'`
do

echo "Instance name = $v_inst"
export ORACLE_SID=$v_inst

# Fetch the list of PDBs (excluding the Seed PDB)
# We use -S (silent) to keep the output clean for the loop
PDB_LIST=$(sqlplus -S / as sysdba <<EOF
SET HEAD OFF FEEDBACK OFF PAGES 0
SELECT name FROM v\$pdbs WHERE name != 'PDB\$SEED';
EXIT;
EOF
)

echo "----------------------------------------------------"
echo "Iterating through PDBs for SID: $ORACLE_SID"
echo "----------------------------------------------------"

for PDB in $PDB_LIST
do
    echo "Checking PDB: $PDB"

    sqlplus -S / as sysdba <<EOF
    set lines 120 pages 200
    ALTER SESSION SET CONTAINER = $PDB;
    SHOW CON_NAME;
    EXIT;
EOF
    echo "----------------------------------------------------"
done


done