I used to use an 'SFTP' command weekly, but all of a sudden it won't work.

I used to do: sftp -b <file with put commands> <username>@<server>

But all of a sudden every time that I try now I get:

Permission denied (publickey,password,keyboard-interactive).
Connection closed



Any ideas what would cause this???

Thank you!

The remote authentication is failing on the box you connecting to.
Some possible reasons:
your account is disabled over there for a variety of reasons
The domain name or IP of the box you are sftp-ing from has changed.
You are on a new box trying to connect.

I can sftp "manually" (where I have to type the password) fine. But when I do the -b option, it fails. Does that mean I can rule out possible cause #2?

Thanks!

It means your account does work on the remote box.

Something external your authentication by password has changed -

Did you check your authentication keys?
Did the account/location you are connecting from change?
Did the sysadmin do something to security on the remote box?

In order to help, you have to indicate what is different.

I don't run the box I'm connecting from, just the box I'm connecting to. Nothing has changed on the box I'm connecting to.

How can I check the authentication keys?