Check if linked server exist

if not exists(select * from sys.servers where name = N'LS01')
begin
	print 'create linked server'
end 

IF NOT EXISTS(select * from sys.servers where name = N'LS01')
BEGIN

	EXEC master.dbo.sp_addlinkedserver @server = N'LS01', @srvproduct=N'SQL_SERVER', @provider=N'SQLNCLI11', @datasrc=N'MYSERVER01'
	EXEC master.dbo.sp_addlinkedsrvlogin @rmtsrvname=N'LS01',@useself=N'True',@locallogin=NULL,@rmtuser=NULL,@rmtpassword=NULL
	GO

	EXEC master.dbo.sp_serveroption @server=N'LS01', @optname=N'collation compatible', @optvalue=N'false'
	GO

	EXEC master.dbo.sp_serveroption @server=N'LS01', @optname=N'data access', @optvalue=N'true'
	GO

	EXEC master.dbo.sp_serveroption @server=N'LS01', @optname=N'dist', @optvalue=N'false'
	GO

	EXEC master.dbo.sp_serveroption @server=N'LS01', @optname=N'pub', @optvalue=N'false'
	GO

	EXEC master.dbo.sp_serveroption @server=N'LS01', @optname=N'rpc', @optvalue=N'false'
	GO

	EXEC master.dbo.sp_serveroption @server=N'LS01', @optname=N'rpc out', @optvalue=N'false'
	GO

	EXEC master.dbo.sp_serveroption @server=N'LS01', @optname=N'sub', @optvalue=N'false'
	GO

	EXEC master.dbo.sp_serveroption @server=N'LS01', @optname=N'connect timeout', @optvalue=N'0'
	GO

	EXEC master.dbo.sp_serveroption @server=N'LS01', @optname=N'collation name', @optvalue=null
	GO

	EXEC master.dbo.sp_serveroption @server=N'LS01', @optname=N'lazy schema validation', @optvalue=N'false'
	GO

	EXEC master.dbo.sp_serveroption @server=N'LS01', @optname=N'query timeout', @optvalue=N'0'
	GO

	EXEC master.dbo.sp_serveroption @server=N'LS01', @optname=N'use remote collation', @optvalue=N'true'
	GO

	EXEC master.dbo.sp_serveroption @server=N'LS01', @optname=N'remote proc transaction promotion', @optvalue=N'true'
	GO

END