How to setup sftp beteen two servers?

Hi

Could you please help me out how to configure between two server I don't have admin idea to setup the Sftp server

the requirements is we want to send a file to vendor so we need sftp configuration so that can we can send file through sftp

Please let me know what should I ask to vendor to configure the sftp server so that we can send the file through sftp

Please share me the knowledge if u have
1.we can setup the sftp server or vender can do there side
2.for this what information required for vendor side

Most (all?) server versions of Linux include the ssh server side programs.
With some versions you have to indicate that you want to start the service when the server boots, with others it happens automatically.
You may have to open a port in a firewall, this defaults to port 22 but it can be any.
To see how much work you have to do, simply execute the following command on each of the machines:

sftp localhost

If you get an indication that this did not fail because the program was not found, all that is now required is confirm that the two machines can see each other on a common port.