As a postscript, a shell pet peeve of mine:

cat `lsnrctl stat ZRRI_LISTENER|grep Parameter|awk '{print $4}'`
[download]

Awk can do the grepping for you:

cat `lsnrctl stat ZRRI_LISTENER| awk '/Parameter/ {print $4}'`
[download]

Save a process! One day they might be endangered!