/dev/root shows 100% use on fresh install

Kris,

I can confirm this isn't the case on a new 16.04 install:

Before:

Filesystem      Size  Used Avail Use% Mounted on
/dev/root        15G  754M   13G   6% /
devtmpfs        493M     0  493M   0% /dev
tmpfs           495M     0  495M   0% /dev/shm
tmpfs           495M  7.7M  488M   2% /run
tmpfs           5.0M     0  5.0M   0% /run/lock
tmpfs           495M     0  495M   0% /sys/fs/cgroup
tmpfs            99M     0   99M   0% /run/user/0

After apt-get update && apt-get dist-upgrade:

Filesystem      Size  Used Avail Use% Mounted on
/dev/root        15G  837M   13G   6% /
devtmpfs        493M     0  493M   0% /dev
tmpfs           495M     0  495M   0% /dev/shm
tmpfs           495M  7.7M  488M   2% /run
tmpfs           5.0M     0  5.0M   0% /run/lock
tmpfs           495M     0  495M   0% /sys/fs/cgroup
tmpfs            99M     0   99M   0% /run/user/0

I'm assuming this isn't a brand new image - you must have some additional files / applications installed. I'd take a look at some of these commands to help narrow things down: https://www.tecmint.com/find-top-large- … -in-linux/">https://www.tecmint.com/find-top-large-directories-and-files-sizes-in-linux/

Which guide did you follow? A blank brand new installation of Ubuntu on Linode will not produce what you describe.