(BeagleBoneBlack)ubuntu@localhost:~$ snappy list -v
Name        Date       Version Developer 
ubuntu-core 2015-07-23 7       ubuntu*   
ubuntu-core 2015-07-23 7       ubuntu    
beagleblack 2015-07-24 1.8     *         
(BeagleBoneBlack)ubuntu@localhost:~$ sudo snappy update
Installing ubuntu-core (8)
Starting download of ubuntu-core
Applying update[|]
Apply done
Updating boot files
27.29 MB / 27.29 MB [=============================================================================================================================] 100.00 % 230.98 KB/s 
Done
can not find file /writable/cache/assets/vmlinuz
(BeagleBoneBlack)ubuntu@localhost:~$ ls /writable/cache/assets/
initrd.img  initrd.img-3.19.0-23-generic