Find old linked servers on a restored copy of master/msdb db
The system catalogs (SYS objects) are stored in the resource DB. The resource DB is usually located at: &lt;drive&gt;:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\Data\, i.e. the same location of the master DB. Yes, this is like the fifth system database. 

Check this link on: Moving the master and Resource Databases to move your master and resource DB.