[Bug 1569019] Re: rsa ssh login fails with "sign_and_send_pubkey: signing failed: agent refused operation" error

[M.Morana]

Installed Xenial 16.04 via debootstrap so I couldhave a zfs root/boot
and somehow hit this problem and couldn't figure it out right away.  The
ssh error message should have a clearer way of deciphering the problem
but ssh-add did fix it.  Shouldn't this problem be avoided in the ssh-
keygen utility or does this user creation case actually make sense
somewhere?  Thank you.

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https://bugs.launchpad.net/bugs/1569019

Title:
  rsa ssh login fails with "sign_and_send_pubkey: signing failed: agent
  refused operation" error

Status in Ubuntu Server Guide:
  New
Status in gnupg2 package in Ubuntu:
  Confirmed

Bug description:
  if you follow the guild

  https://help.ubuntu.com/14.04/serverguide/openssh-server.html

  logins will fail with the error

  sign_and_send_pubkey: signing failed: agent refused operation

  until the command

  ssh-add

  is executed on the client machine.

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