:~$ sudo apt-get install gnome-tweak-tool
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following additional packages will be installed:
  gir1.2-gdesktopenums-3.0 gir1.2-gnomedesktop-3.0 gnome-settings-daemon
  gnome-shell-common mutter-common python-gi
Suggested packages:
  python-gi-cairo
The following NEW packages will be installed:
  gir1.2-gdesktopenums-3.0 gir1.2-gnomedesktop-3.0 gnome-settings-daemon
  gnome-shell-common gnome-tweak-tool mutter-common python-gi
0 upgraded, 7 newly installed, 0 to remove and 0 not upgraded.
Need to get 2,121 kB of archives.
After this operation, 13.8 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 gir1.2-gdesktopenums-3.0 amd64 3.18.1-1ubuntu1 [8,534 B]
Get:2 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 gir1.2-gnomedesktop-3.0 amd64 3.18.2-1ubuntu1 [8,618 B]
Get:3 http://us.archive.ubuntu.com/ubuntu xenial-updates/universe amd64 gnome-shell-common all 3.18.5-0ubuntu0.2 [608 kB]
11% [3 gnome-shell-common 131 kB/608 kB 22%]                   643 B/s 51min 7s