linked server - sql server

hello
im trying to recreate linked server on my production server , the linked server already working on the test server.
i tried to copy all the settings from the test server but i recive this error:

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_TITLE: Microsoft SQL Server Management Studio

The test connection to the linked server failed.

ADDITIONAL INFORMATION:

An exception occurred while executing a Transact-SQL statement or batch. (Microsoft.SqlServer.ConnectionInfo)

Named Pipes Provider: Could not open a connection to SQL Server [53].
OLE DB provider "" for linked server "DB" returned message "Login timeout expired".
OLE DB provider "***" for linked server "DB**" returned message "A network-related or instance-specific error has occurred while establishing a connection to SQL Server. Server is not found or not accessible. Check if instance name is correct and if SQL Server is configured to allow remote connections. For more information see SQL Server Books Online.". (Microsoft SQL Server, Error: 53)_
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No repository file, test, or code entry point is identified in the issue. Start by comparing the linked-server settings between the test and production servers and investigate the reported SQL Server error 53 and login timeout; done would require a reproducible, actionable repository change or a confirmed resolution.