Ubuntu: Boot-Partition full

In case your /boot is used 100%

List your installed kernels:

sudo dpkg -l | grep linux-image

remove old files:

sudo apt-get purge linux-image-4.4.0-93-generic

Sonos Infos

In case you need more information about your Sonos players in your Network:

<IP of your Player>:1400/support/review

i.e.

http://192.168.1.123:1400/support/review