restore Master from Backup

To restore the master database

1. Start the server instance in single-user mode.

To configure startup options

1. In SQL Server Configuration Manager, click SQL Server Services.
2. In the right pane, right-click SQL Server (<instance_name>), and then click Properties.
3. On the Startup Parameters tab, in the Specify a startup parameter box, type the parameter, and then click Add.

   For example, to start in single-user mode, type -m in the Specify a startup parameter box and then click Add. (When you restart SQL Server in single-user mode, stop the SQL Server Agent. Otherwise, SQL Server Agent might connect first and prevent you from connecting as a second user.)
4. Click OK.
5. Restart the Database Engine.

To restore a full database backup of master

use the following RESTORE DATABASE Transact-SQL statement:

RESTORE DATABASE master FROM <backup_device> WITH REPLACE

C:\Users\boconnell>SQLCMD -E -S touch -Q "RESTORE DATABASE Master FROM DISK='\\BlahBlah\sqlbackups\PRD\VM\Blah05P$PRD5\master\FULL\Blah05P$PRD5_master_FULL_20150806_140500.bak" WITH REPLACE

Nota Bena:
make sure that all databases are present that were present beffore the restore. If any are not accessable then attach them.