That's the description:
Name Version Developer Notes Summary base 16.04+20160525.05-00 canonical - Base content for snapd
It's contents are very similar to "ubuntu-core" package":
base: ----- -rw-r--r-- 1 root root 0 may 25 20:55 base_16.04+20160525.05-00_amd64.snap drwxr-xr-x 2 root root 1739 may 25 06:59 bin/ drwxr-xr-x 5 root root 109 may 25 06:59 boot/ drwxr-xr-x 4 root root 1597 may 25 06:58 dev/ drwxr-xr-x 77 root root 2367 may 25 06:59 etc/ drwxr-xr-x 3 root root 29 may 25 06:59 home/ drwxr-xr-x 18 root root 379 may 25 06:59 lib/ drwxr-xr-x 2 root root 43 may 25 06:57 lib64/ drwxr-xr-x 2 root root 3 may 25 06:57 media/ drwxr-xr-x 2 root root 32 may 25 20:55 meta/ drwxr-xr-x 2 root root 3 may 25 06:57 mnt/ drwxr-xr-x 2 root root 3 may 25 06:57 opt/ drwxr-xr-x 2 root root 3 abr 12 22:14 proc/ drwx------ 2 root root 46 may 25 06:59 root/ drwxr-xr-x 8 root root 115 may 25 06:58 run/ drwxr-xr-x 2 root root 2267 may 25 06:59 sbin/ drwxr-xr-x 2 root root 3 may 19 23:33 snap/ drwxr-xr-x 2 root root 3 may 25 06:57 srv/ drwxr-xr-x 2 root root 3 feb 5 10:48 sys/ drwxrwxrwt 2 root root 3 may 25 06:59 tmp/ drwxr-xr-x 11 root root 151 may 25 06:58 usr/ drwxr-xr-x 12 root root 160 may 25 06:59 var/ drwxr-xr-x 2 root root 3 may 25 06:59 writable/
ubuntu-core: ------------ -rw-r--r-- 1 root root 0 may 25 20:55 base_16.04+20160525.05-00_amd64.snap drwxr-xr-x 2 root root 1739 may 25 06:59 bin/ drwxr-xr-x 5 root root 109 may 25 06:59 boot/ drwxr-xr-x 4 root root 1597 may 25 06:58 dev/ drwxr-xr-x 77 root root 2367 may 25 06:59 etc/ drwxr-xr-x 3 root root 29 may 25 06:59 home/ drwxr-xr-x 18 root root 379 may 25 06:59 lib/ drwxr-xr-x 2 root root 43 may 25 06:57 lib64/ drwxr-xr-x 2 root root 3 may 25 06:57 media/ drwxr-xr-x 2 root root 32 may 25 20:55 meta/ drwxr-xr-x 2 root root 3 may 25 06:57 mnt/ drwxr-xr-x 2 root root 3 may 25 06:57 opt/ drwxr-xr-x 2 root root 3 abr 12 22:14 proc/ drwx------ 2 root root 46 may 25 06:59 root/ drwxr-xr-x 8 root root 115 may 25 06:58 run/ drwxr-xr-x 2 root root 2267 may 25 06:59 sbin/ drwxr-xr-x 2 root root 3 may 19 23:33 snap/ drwxr-xr-x 2 root root 3 may 25 06:57 srv/ drwxr-xr-x 2 root root 3 feb 5 10:48 sys/ drwxrwxrwt 2 root root 3 may 25 06:59 tmp/ drwxr-xr-x 11 root root 151 may 25 06:58 usr/ drwxr-xr-x 12 root root 160 may 25 06:59 var/ drwxr-xr-x 2 root root 3 may 25 06:59 writable/
Dunno why I've it installed. I tested several packages and then removed them, but this one and ubuntu-core remains unremovables.
That's the description:
Name Version Developer Notes Summary 05-00 canonical - Base content for snapd
base 16.04+20160525.
It's contents are very similar to "ubuntu-core" package":
base: 04+20160525. 05-00_amd64. snap
-----
-rw-r--r-- 1 root root 0 may 25 20:55 base_16.
drwxr-xr-x 2 root root 1739 may 25 06:59 bin/
drwxr-xr-x 5 root root 109 may 25 06:59 boot/
drwxr-xr-x 4 root root 1597 may 25 06:58 dev/
drwxr-xr-x 77 root root 2367 may 25 06:59 etc/
drwxr-xr-x 3 root root 29 may 25 06:59 home/
drwxr-xr-x 18 root root 379 may 25 06:59 lib/
drwxr-xr-x 2 root root 43 may 25 06:57 lib64/
drwxr-xr-x 2 root root 3 may 25 06:57 media/
drwxr-xr-x 2 root root 32 may 25 20:55 meta/
drwxr-xr-x 2 root root 3 may 25 06:57 mnt/
drwxr-xr-x 2 root root 3 may 25 06:57 opt/
drwxr-xr-x 2 root root 3 abr 12 22:14 proc/
drwx------ 2 root root 46 may 25 06:59 root/
drwxr-xr-x 8 root root 115 may 25 06:58 run/
drwxr-xr-x 2 root root 2267 may 25 06:59 sbin/
drwxr-xr-x 2 root root 3 may 19 23:33 snap/
drwxr-xr-x 2 root root 3 may 25 06:57 srv/
drwxr-xr-x 2 root root 3 feb 5 10:48 sys/
drwxrwxrwt 2 root root 3 may 25 06:59 tmp/
drwxr-xr-x 11 root root 151 may 25 06:58 usr/
drwxr-xr-x 12 root root 160 may 25 06:59 var/
drwxr-xr-x 2 root root 3 may 25 06:59 writable/
ubuntu-core: 04+20160525. 05-00_amd64. snap
------------
-rw-r--r-- 1 root root 0 may 25 20:55 base_16.
drwxr-xr-x 2 root root 1739 may 25 06:59 bin/
drwxr-xr-x 5 root root 109 may 25 06:59 boot/
drwxr-xr-x 4 root root 1597 may 25 06:58 dev/
drwxr-xr-x 77 root root 2367 may 25 06:59 etc/
drwxr-xr-x 3 root root 29 may 25 06:59 home/
drwxr-xr-x 18 root root 379 may 25 06:59 lib/
drwxr-xr-x 2 root root 43 may 25 06:57 lib64/
drwxr-xr-x 2 root root 3 may 25 06:57 media/
drwxr-xr-x 2 root root 32 may 25 20:55 meta/
drwxr-xr-x 2 root root 3 may 25 06:57 mnt/
drwxr-xr-x 2 root root 3 may 25 06:57 opt/
drwxr-xr-x 2 root root 3 abr 12 22:14 proc/
drwx------ 2 root root 46 may 25 06:59 root/
drwxr-xr-x 8 root root 115 may 25 06:58 run/
drwxr-xr-x 2 root root 2267 may 25 06:59 sbin/
drwxr-xr-x 2 root root 3 may 19 23:33 snap/
drwxr-xr-x 2 root root 3 may 25 06:57 srv/
drwxr-xr-x 2 root root 3 feb 5 10:48 sys/
drwxrwxrwt 2 root root 3 may 25 06:59 tmp/
drwxr-xr-x 11 root root 151 may 25 06:58 usr/
drwxr-xr-x 12 root root 160 may 25 06:59 var/
drwxr-xr-x 2 root root 3 may 25 06:59 writable/
Dunno why I've it installed. I tested several packages and then removed them, but this one and ubuntu-core remains unremovables.