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This question already has an answer here:

I cannot seem to install any downloaded .deb package by clicking on it (I am on Ubuntu 16.04):

  • they open with the "Ubuntu Software" GUI, with a button "Install";
  • clicking on this button seems to do something (as in, a progress-bar appears), but the software is not installed afterwards.

I can install them from the console using sudo apt install /path/to/foo.deb, but I would like to know why the graphical way of doing things doesn't work.

Note: I know I can also install gdebi to install .deb packages, but that's not really the point of my question :)

marked as duplicate by muru, Android Dev, edwinksl, Byte Commander, Mark Kirby Aug 26 '17 at 13:55

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    Uhm, apt install does not take filenames as argument. You have to use sudo dpkg -i /path/to/package.deb, after which you likely have to run sudo apt install -f to fix missing dependencies. – Byte Commander Aug 26 '17 at 13:11
  • @ByteCommander Have you tried it? It might just be an alias of dpkg -i, but apt install ./foo.deb works. – Sheljohn Aug 26 '17 at 13:15
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    @Sheljohn Oh, indeed. I did try it, but with implicit relative paths only (i.e. apt install Downloads/test.deb). It works with explicit relative paths (./Downloads/test.deb) or absolute paths (/home/username/Downloads/test.deb) though. Learned something today. Unfortunately Bash-autocomplete doesn't pick up filenames there. – Byte Commander Aug 26 '17 at 13:33