Comment 2 for bug 1732004

Gladly. This has happened before: https://bugs.launchpad.net/juju/+bug/1592613

$ juju show-machine 0
model: default
machines:
  "0":
    juju-status:
      current: started
      since: 13 Nov 2017 13:49:43-05:00
      version: 2.0.2
    dns-name: 147.75.33.34
    ip-addresses:
    - 147.75.33.34
    - 2604:1380:2000:2b00::9
    - 10.80.7.139
    instance-id: manual:147.75.33.34
    machine-status:
      current: pending
      since: 13 Nov 2017 13:47:53-05:00
    series: xenial
    hardware: arch=arm64 cores=1 mem=128872M
$ juju ssh 0 'cat /proc/cpuinfo' > cpuinfo-arm64-thunderx.txt
sign_and_send_pubkey: signing failed: agent refused operation
Connection to 147.75.33.34 closed.
$ juju ssh 0 'uname -a '
sign_and_send_pubkey: signing failed: agent refused operation
Linux node0 4.10.0-38-generic #42~16.04.1-Ubuntu SMP Tue Oct 10 16:33:57 UTC 2017 aarch64 aarch64 aarch64 GNU/Linux
Connection to 147.75.33.34 closed.
$ juju ssh 0 'lsb_release -a'
sign_and_send_pubkey: signing failed: agent refused operation
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.3 LTS
Release: 16.04
Codename: xenial
Connection to 147.75.33.34 closed.