Shut Down the Session Delivery Manager Server

You can shut down the existing Oracle Communications Session Delivery Manager software version running on your system to install a new version of the software, restore a database or apply a software patch. If you are upgrading an OCSDM cluster, use these steps to shut down each server node in the cluster.

Login to your server as the nncentral user.
Navigate to the OCSDM installation bin directory.
For example:
```
cd /<sdm-install-directory>/AcmePacket/NNC<version>/bin
```
Run the shutdownnnc.sh script. By default, the shutdownnnc.sh script detects whether the existing installation is a standalone or clustered system and prompts you with the option to shut down the entire cluster if no flag options are provided.
Note:
However, You can script an option ahead of time by adding -local for single nodes and -cluster to shutdown an entire cluster.
```
./shutdownnnc.sh
Shutdown back-end server
Do you wish to shut down the entire cluster (Yes/No)? Yes
```