Suddenly can't login to filezilla with EC2 amazon server

Question

I have a free EC2 Amazon Ubuntu server and I was connected with putty and filezilla and I was transferring files. Suddenly I lost connection and now whenever I login on either putty of filezilla I get and error saying

Disconnected: No supported authentication methods available (server sent: publickey)

Any ideas what could be possibly happening? I think that before this happened I change the permissions of a folder. Don't know if that's relevant.

You used password or key to login? – helloV Mar 19 '16 at 03:33 — helloV, Mar 19 '16 at 03:33
@helloV key, there is no password – dimitris93 Mar 19 '16 at 03:40 — dimitris93, Mar 19 '16 at 03:40

score 1 · Answer 1 · edited May 23 '17 at 12:15

I think that before this happened I change the permissions of a folder. Don't know if that's relevant

Did you change the permission of ~/.ssh directory? ssh expects the directory to have 700 as permission and the ~/.ssh/authorized_key file to have 600 permission. Do you remember what exactly you changed?

You are out of luck if you changed the permissions of ~/.ssh folder. There are other convoluted ways to restore access. You have to stop the instance, attach the root partition to another instance, then change the folder permission, detach the partition, attach it back to your original instance and start it. Search StackOverflow for answers.

Even if I did, how would I even change it back since I can't even access my server anymore. — dimitris93, Mar 19 '16 at 03:40

Suddenly can't login to filezilla with EC2 amazon server

1 Answers1