root@test-deploy:~# dpkg -i /tmp/packagename-6.5.deb
Selecting previously unselected package packagename.
(Reading database ... 41282 files and directories currently installed.)
Preparing to unpack /tmp/packagename-6.5.deb ...
Unpacking packagename (6.5-1) ...
Setting up packagename (6.5-1) ...

root@test-deploy:~# apt install /tmp/packagename-6.5.deb
Reading package lists... Done
Building dependency tree
Reading state information... Done
Note, selecting 'packagename' instead of '/tmp/packagename-6.5.deb'
The following NEW packages will be installed:
  packagename
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/381 MB of archives.
After this operation, 0 B of additional disk space will be used.
Get:1 /tmp/packagename-6.5.deb packagename amd64 6.5-1 [381 MB]
Preconfiguring packages ...
Selecting previously unselected package packagename.
(Reading database ... 41282 files and directories currently installed.)
Preparing to unpack /tmp/packagename-6.5.deb ...
Unpacking packagename (6.5-1) ...