console.log

$ sudo apt-get update
... # trunicated # ...
Ign https://packagecloud.io jessie/main Translation-en
Ign http://mirrordirector.raspbian.org jessie/contrib Translation-en_US
Ign http://mirrordirector.raspbian.org jessie/contrib Translation-en
Ign http://mirrordirector.raspbian.org jessie/main Translation-en_US
Ign http://mirrordirector.raspbian.org jessie/main Translation-en
Ign http://mirrordirector.raspbian.org jessie/non-free Translation-en_US
Ign http://mirrordirector.raspbian.org jessie/non-free Translation-en
Ign http://mirrordirector.raspbian.org jessie/rpi Translation-en_US
Ign http://mirrordirector.raspbian.org jessie/rpi Translation-en
Fetched 23.5 kB in 15s (1,539 B/s)
Reading package lists... Done
Building dependency tree
Reading state information... Done
All packages are up to date.
N: Ignoring file '20auto-upgrades.ucf-dist' in directory '/etc/apt/apt.conf.d/' as it has an invalid filename extension
W: GPG error: https://packagecloud.io jessie InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 6FD547CACEBBD6E9
HypriotOS/armv7: pirate@dni in ~/workspace/clients/rearc.io/0cbda45b-ca37-45ad-8b0e-1027b99b4787 on master
$ curl -L "https://packagecloud.io/Hypriot/rpi/gpgkey" 2> /dev/null | sudo apt-key add -
OK
HypriotOS/armv7: pirate@dni in ~/workspace/clients/rearc.io/0cbda45b-ca37-45ad-8b0e-1027b99b4787 on master
$ apt-key list
... see gistfile1.txt ...

gistfile1.txt

/etc/apt/trusted.gpg
--------------------
pub   2048R/90FDDD2E 2012-04-01
uid                  Mike Thompson (Raspberry Pi Debian armhf ARMv6+VFP) <mpthompson@gmail.com>
sub   2048R/5373DC6C 2012-04-01

pub   4096R/D59097AB 2014-01-13 [expired: 2019-01-12]
uid                  packagecloud ops (production key) <ops@packagecloud.io>

pub   2048R/7FA3303E 2012-06-17
uid                  Raspberry Pi Archive Signing Key
sub   2048R/EDD83D6C 2012-06-17

pub   4096R/2C52609D 2015-07-14
uid                  Docker Release Tool (releasedocker) <docker@docker.com>

pub   4096R/0EBFCD88 2017-02-22
uid                  Docker Release (CE deb) <docker@docker.com>
sub   4096R/F273FCD8 2017-02-22

pub   4096R/C26E2C1E 2018-10-08
uid                  https://packagecloud.io/Hypriot/rpi (https://packagecloud.io/docs#gpg_signing) <support@packagecloud.io>
sub   4096R/D1528977 2018-10-08