ubuntu@linux:~$ sudo apt install gdebi-core
[sudo] password for ubuntu: 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
  dconf-editor dconf-tools libgexiv2-2 libqca-qt5-2 libqca-qt5-2-plugins
  quassel-data
Use 'sudo apt autoremove' to remove them.
The following NEW packages will be installed:
  gdebi-core
0 upgraded, 1 newly installed, 0 to remove and 7 not upgraded.
Need to get 9,716 B of archives.
After this operation, 135 kB of additional disk space will be used.
Get:1 http://archive.ubuntu.com/ubuntu xenial/main amd64 gdebi-core all 0.9.5.7ubuntu1 [9,716 B]
Fetched 9,716 B in 5s (1,884 B/s)     
Selecting previously unselected package gdebi-core.
(Reading database ... 290061 files and directories currently installed.)
Preparing to unpack .../gdebi-core_0.9.5.7ubuntu1_all.deb ...
Unpacking gdebi-core (0.9.5.7ubuntu1) ...
Processing triggers for man-db (2.7.5-1) ...
Setting up gdebi-core (0.9.5.7ubuntu1) ...