xp_cmdshell help; The configuration option 'xp_cmdshell' does not exist, or it may be an advanced option.

Msg 15281, Level 16, State 1, Procedure xp_cmdshell, Line 1

SQL Server blocked access to procedure 'sys.xp_cmdshell' of component 'xp_cmdshell' because this component is turned off as part of the security configuration for this server. A system administrator can enable the use of 'xp_cmdshell' by using sp_configure. For more information about enabling 'xp_cmdshell', see "Surface Area Configuration" in SQL Server Books Online.

Execute below statements to enable "xp_cmdshell" and 

EXEC sp_configure 'xp_cmdshell', 1  

GO  

RECONFIGURE  

GO

After executing above statements if you are facing below error

Msg 15123, Level 16, State 1, Procedure sp_configure, Line 51

The configuration option 'xp_cmdshell' does not exist, or it may be an advanced option.

Try below statements to enable advanced options  

EXEC sp_configure 'show advanced options', 1;  

GO  

RECONFIGURE;  

GO  

EXEC sp_configure 'xp_cmdshell', 1;  

GO  

RECONFIGURE;  

GO