The following method has been tested with the version of Microsoft SharePoint 2010 for recovering the Database Files and getting the server back up and running.
Login to the NetBackup GUI and navigate to Backup, Archive and Restore section.
Click on the Restore Files tab and select the Source, Destination Client and type of Policy to restore the SharePoint backup files. The Policy Type will be Standard.
Under Browse Directory select the DB files files to restore.
Chose to restore to a different location, and change the target destination to a temporary location on any Unix machine. Then restore the files and copy the restored files to the SharePoint server.
If your SharePoint farm has SQL Server Management Studio installed then please follow this step , else jump to step 6 to restore using SQLCMD.
Login to the SSMS and do a native MSSQL Database restore from .BAK files.
Use SQLCMD to restore your DB as shown in the below screenshots.