apt install ./gp4-cam-feed-configs_2.0-r4_all.deb
Reading package lists... Done
Building dependency tree
Reading state information... Done
Note, selecting 'gp4-cam-feed-configs' instead of './gp4-cam-feed-configs_2.0-r4_all.deb'
The following NEW packages will be installed:
gp4-cam-feed-configs
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/1.776 B of archives.
After this operation, 0 B of additional disk space will be used.
Get:1 /root/gp4-cam-feed-configs_2.0-r4_all.deb gp4-cam-feed-configs all 2.0-r4 [1.776 B]
Selecting previously unselected package gp4-cam-feed-configs.
(Reading database ... 17348 files and directories currently installed.)
Preparing to unpack .../gp4-cam-feed-configs_2.0-r4_all.deb ...
Unpacking gp4-cam-feed-configs (2.0-r4) ...
Setting up gp4-cam-feed-configs (2.0-r4) ...
GP4 unavailable!
Abort installation
N: Can't drop privileges for downloading as file '/root/gp4-cam-feed-configs_2.0-r4_all.deb' couldn't be accessed by user '_apt'. - pkgAcquire::Run (13: Permission denied)