Unlock shadow instance

To login to the shadow instance with a user account other than SAP* or DDIC you need to unlock
it:

1. Log on as user <SAPSID>adm

2. Enter the following command (this assumes you use /usr/sap/put as your upgrade directory):

cd /usr/sap/put/bin
./R3up unlockshd <SAPSID>

or 

./SAPup unlockshd <SAPSID>


If shadow instance isn't running you can start it with the following command:

./SAPup startshd

and to stop:

./SAPup stopshd