How to create an SFTP Server?

If you can log in over SSH, you can SFTP.

Just ensure that all your users and directories have minimal permissions.
 
Funny!

I think the question is how to enable SFTP without allowing SSH. A while back, I was troubleshooting a godaddy site, and found that their support calls SFTP as FTP.
They provide SFTP without shell access.

The following entry in sshd_config converts ssh(openssh-server) into a sftp server. I suppose, this can be done in a read only authorized_keys too.

Code:
ForceCommand internal-sftp

NOTE: Careful, this applies for all users. Don't get yourself locked out. Use another instance or some other daemon.
 
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