On Unix, the ssh-convert-ftp command has to be run to activate FTP-SFTP conversion.

For example, to start an FTP session to ftp.example.org with FTP-SFTP conversion enabled, run the following command:

$ ssh-convert-ftp ftp ftp.example.org

To start a bash shell session with FTP-SFTP conversion enabled for all commands, run the following command:

$ ssh-convert-ftp bash

For more information, see ssh-convert-ftp (EFT Expansion Pack on Unix)(1).