snap-upgrade

## snap-upgrade
ubuntu@darthbawlz:~$ sudo snap install ubuntu-core
ubuntu-core 16.04.1 from 'canonical' installed
ubuntu@darthbawlz:~$ snap list
Name         Version  Rev   Developer  Notes
ubuntu-core  16.04.1  1411  canonical  -
ubuntu@darthbawlz:~$ sudo snap refresh --candidate ubuntu-core
ubuntu-core (candidate) 16.04.1 from 'canonical' refreshed
ubuntu@darthbawlz:~$ snap list
Name         Version  Rev   Developer  Notes
ubuntu-core  16.04.1  1507  canonical  -
ubuntu@darthbawlz:~$ sudo snap install core
core 16.04.1 from 'canonical' installed
ubuntu@darthbawlz:~$ snap list
Name         Version  Rev   Developer  Notes
core         16.04.1  888   canonical  -
ubuntu-core  16.04.1  1507  canonical  -
ubuntu@darthbawlz:~$ sudo snap remove core
error: cannot remove "core": snap "core" is not removable
ubuntu@darthbawlz:~$ sudo snap remove ubuntu-core
error: cannot remove "ubuntu-core": snap "ubuntu-core" is not removable
ubuntu@darthbawlz:~$ journalctl -u snapd
-- Logs begin at Mon 2017-02-06 16:55:39 UTC, end at Mon 2017-02-06 17:02:43 UTC. --
Feb 06 16:55:54 darthbawlz systemd[1]: Started Snappy daemon.
Feb 06 16:55:54 darthbawlz /usr/lib/snapd/snapd[1157]: daemon.go:250: DEBUG: init done in 991.411µs
Feb 06 16:55:54 darthbawlz /usr/lib/snapd/snapd[1157]: daemon.go:251: started snapd/2.21 (series 16; classic) ubuntu/16.04 (amd64).
Feb 06 16:55:54 darthbawlz snapd[1157]: 2017/02/06 16:55:54.344005 daemon.go:251: started snapd/2.21 (series 16; classic) ubuntu/16.04 (amd64).
Feb 06 17:01:21 darthbawlz /usr/lib/snapd/snapd[1157]: api.go:879: Installing snap "ubuntu-core" revision unset
Feb 06 17:01:21 darthbawlz snapd[1157]: 2017/02/06 17:01:21.653714 api.go:879: Installing snap "ubuntu-core" revision unset
Feb 06 17:01:22 darthbawlz /usr/lib/snapd/snapd[1157]: daemon.go:176: DEBUG: uid=0;@ POST /v2/snaps/ubuntu-core 555.132489ms 202
Feb 06 17:01:22 darthbawlz /usr/lib/snapd/snapd[1157]: taskrunner.go:353: DEBUG: Running task 1 on Do: Download snap "ubuntu-core" (1411) from channel "s
Feb 06 17:01:35 darthbawlz /usr/lib/snapd/snapd[1157]: taskrunner.go:353: DEBUG: Running task 2 on Do: Fetch and check assertions for snap "ubuntu-core"
Feb 06 17:01:36 darthbawlz /usr/lib/snapd/snapd[1157]: taskrunner.go:353: DEBUG: Running task 3 on Do: Mount snap "ubuntu-core" (1411)
Feb 06 17:01:37 darthbawlz /usr/lib/snapd/snapd[1157]: taskrunner.go:353: DEBUG: Running task 4 on Do: Copy snap "ubuntu-core" data
Feb 06 17:01:37 darthbawlz /usr/lib/snapd/snapd[1157]: taskrunner.go:353: DEBUG: Running task 5 on Do: Setup snap "ubuntu-core" (1411) security profiles
Feb 06 17:01:37 darthbawlz /usr/lib/snapd/snapd[1157]: taskrunner.go:353: DEBUG: Running task 6 on Do: Make snap "ubuntu-core" (1411) available to the sy
Feb 06 17:01:37 darthbawlz /usr/lib/snapd/snapd[1157]: task.go:303: DEBUG: 2017-02-06T17:01:37Z INFO Requested daemon restart.
Feb 06 17:01:37 darthbawlz /usr/lib/snapd/snapd[1157]: taskrunner.go:353: DEBUG: Running task 7 on Do: Set automatic aliases for snap "ubuntu-core"
Feb 06 17:01:37 darthbawlz systemd[1]: snapd.service: Service hold-off time over, scheduling restart.
Feb 06 17:01:37 darthbawlz systemd[1]: Stopped Snappy daemon.
Feb 06 17:01:37 darthbawlz systemd[1]: Started Snappy daemon.
Feb 06 17:01:37 darthbawlz /usr/lib/snapd/snapd[3369]: cmd.go:105: DEBUG: restarting into "/snap/ubuntu-core/current/usr/lib/snapd/snapd"
Feb 06 17:01:37 darthbawlz /usr/lib/snapd/snapd[3369]: daemon.go:250: DEBUG: init done in 517.461µs
Feb 06 17:01:37 darthbawlz snapd[3369]: 2017/02/06 17:01:37.842776 daemon.go:251: started snapd/2.21 (series 16; classic) ubuntu/16.04 (amd64).
Feb 06 17:01:37 darthbawlz /usr/lib/snapd/snapd[3369]: daemon.go:251: started snapd/2.21 (series 16; classic) ubuntu/16.04 (amd64).
Feb 06 17:01:37 darthbawlz /usr/lib/snapd/snapd[3369]: taskrunner.go:353: DEBUG: Running task 8 on Do: Setup snap "ubuntu-core" aliases
...skipping...
Feb 06 17:02:17 darthbawlz snapd[3655]: 2017/02/06 17:02:17.086258 api.go:888: Installing snap "core" revision unset
Feb 06 17:02:17 darthbawlz /usr/lib/snapd/snapd[3655]: daemon.go:176: DEBUG: uid=0;@ POST /v2/snaps/core 593.888987ms 202
Feb 06 17:02:17 darthbawlz /usr/lib/snapd/snapd[3655]: taskrunner.go:353: DEBUG: Running task 25 on Do: Download snap "core" (888) from channel "stable"
Feb 06 17:02:31 darthbawlz /usr/lib/snapd/snapd[3655]: taskrunner.go:353: DEBUG: Running task 26 on Do: Fetch and check assertions for snap "core" (888)
Feb 06 17:02:32 darthbawlz /usr/lib/snapd/snapd[3655]: taskrunner.go:353: DEBUG: Running task 27 on Do: Mount snap "core" (888)
Feb 06 17:02:33 darthbawlz /usr/lib/snapd/snapd[3655]: taskrunner.go:353: DEBUG: Running task 28 on Do: Copy snap "core" data
Feb 06 17:02:33 darthbawlz /usr/lib/snapd/snapd[3655]: taskrunner.go:353: DEBUG: Running task 29 on Do: Setup snap "core" (888) security profiles
Feb 06 17:02:33 darthbawlz /usr/lib/snapd/snapd[3655]: taskrunner.go:353: DEBUG: Running task 30 on Do: Make snap "core" (888) available to the system
Feb 06 17:02:33 darthbawlz /usr/lib/snapd/snapd[3655]: task.go:303: DEBUG: 2017-02-06T17:02:33Z INFO Requested daemon restart.
Feb 06 17:02:33 darthbawlz /usr/lib/snapd/snapd[3655]: taskrunner.go:353: DEBUG: Running task 31 on Do: Set automatic aliases for snap "core"
Feb 06 17:02:33 darthbawlz systemd[1]: snapd.service: Service hold-off time over, scheduling restart.
Feb 06 17:02:33 darthbawlz systemd[1]: Stopped Snappy daemon.
Feb 06 17:02:33 darthbawlz systemd[1]: Started Snappy daemon.
Feb 06 17:02:33 darthbawlz /usr/lib/snapd/snapd[3865]: cmd.go:105: DEBUG: restarting into "/snap/core/current/usr/lib/snapd/snapd"
Feb 06 17:02:34 darthbawlz /usr/lib/snapd/snapd[3865]: daemon.go:250: DEBUG: init done in 491.752µs
Feb 06 17:02:34 darthbawlz snapd[3865]: 2017/02/06 17:02:34.156766 daemon.go:251: started snapd/2.21 (series 16; classic) ubuntu/16.04 (amd64).
Feb 06 17:02:34 darthbawlz /usr/lib/snapd/snapd[3865]: daemon.go:251: started snapd/2.21 (series 16; classic) ubuntu/16.04 (amd64).
Feb 06 17:02:34 darthbawlz /usr/lib/snapd/snapd[3865]: taskrunner.go:353: DEBUG: Running task 32 on Do: Setup snap "core" aliases
Feb 06 17:02:34 darthbawlz /usr/lib/snapd/snapd[3865]: taskrunner.go:353: DEBUG: Running task 33 on Do: Start snap "core" (888) services
Feb 06 17:02:34 darthbawlz /usr/lib/snapd/snapd[3865]: taskrunner.go:353: DEBUG: Running task 34 on Do: Run configure hook of "core" snap if present
Feb 06 17:02:34 darthbawlz /usr/lib/snapd/snapd[3865]: daemon.go:176: DEBUG: uid=0;@ GET /v2/snaps 1.944541ms 200
Feb 06 17:02:36 darthbawlz /usr/lib/snapd/snapd[3865]: daemon.go:176: DEBUG: uid=1000;@ GET /v2/snaps 798.302µs 200
Feb 06 17:02:39 darthbawlz /usr/lib/snapd/snapd[3865]: daemon.go:176: DEBUG: uid=0;@ POST /v2/snaps/core 908.702µs 400
Feb 06 17:02:43 darthbawlz /usr/lib/snapd/snapd[3865]: daemon.go:176: DEBUG: uid=0;@ POST /v2/snaps/ubuntu-core 837.353µs 400