Cannot SFTP into Retropie

Cannot SFTP into Retropie

I have installed BerryBoot on a microSD card which I use with a Raspberry Pi 3. On this card, I now have a quadruple boot: Raspbian, UbuntuMATE, OpenELEC and Retropie. I am able to launch all operating systems fine by using a keyboard, a mouse and a screen connected directly to the Pi.
Now I want to transfer files from the house main computer (running under Ubuntu 14.04) to RetroPi. I would like to do the transfer through Nautilus since this interface is more user-friendly than using the console.
I boot the Pi and start RetroPi. I am able to ssh from Ubuntu to Retropi using the console. But when I type the following line from the Nautilus menu (Go -> Enter Location):

I get the following error message:
Oops! Something went wrong. Don't have permission to access the requested location.

Any idea why I am getting this error message ? Are there different parameters to allow SSH (working) and SFTP (not working) access on RetroPi ?
Additional Information
1) I get the same error when I try to SFTP into UbuntuMATE.
2) I get the same error when I specity the user name on the Pi:

3) Here is some information I get from running sftp in the terminal:
phodor@UBUNTU: sftp -vvv pi@
OpenSSH_6.6.1, OpenSSL 1.0.1f 6 Jan 2014
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to [] port 22.
debug1: connect to address port 22: Connection refused
ssh: connect to host port 22: Connection refused
Couldn't read packet: Connection reset by peer


Answer 1:

I was able to solve the problem. It turns out there was a key mismatch when doing the ssh between my Ubuntu computer and RetroPie. The IP mismatch was probably caused when I restarted my Pi. I guess IP had been re-associated to OpenELEC or UbuntuMATE. Nautilus was not providing me with any information about this.

When trying to run ssh again in the terminal, I got a new warning and the terminal suggested to run the following command to reset my keys, which solved the issue:

sudo ssh-keygen -f "/root/.ssh/known_hosts" -R

I guess the next step will be to ask static IPs for each Virtual machine on my Pi 3:

Raspbian ->
UbuntuMATE ->
OpenELEC ->
RetroPie ->

Thanks to all who answered: your comments led me to the solution !

Answer 2:

You probably need to specify user to the Nautilus. Something like


should do the job. But also verify if it works from command-line:

sftp pi@

If not, add some verbosity to the output: -vvv switches to sftp will tell you more. See my other AskUbuntu answer.

Answer 3:

You must enable ssh on retro-pi configuration (interface menu).

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