I think you would need to issue the following command:

sudo dpkg -i ucsf-chimerax_1.5ubuntu20.04_amd64.deb 



On Wed, Apr 12, 2023 at 7:56 AM Stephen P. Molnar via ChimeraX-users <chimerax-users@cgl.ucsf.edu> wrote:
I am running an up-to-date installation of Debian Bullseye on my Linux
platform.

My attempt to install ucsf-chimerax_1.5ubuntu20.04_amd64.deb generated
an interesting error message:

     sudo apt install ucsf-chimerax_1.5ubuntu20.04_amd64.deb [sudo]
password for comp:
     Reading package lists... Done
     Building dependency tree... Done
     Reading state information... Done
     E: Unable to locate package ucsf-chimerax_1.5ubuntu20.04_amd64.deb

I have managed to install Chimera, both Linux and Windows versions, many
times without any problems.

Guidance would be much appreciated.

Thanks in advance,

--
Stephen P. Molnar, Ph.D.
https://insilicochemistry.net
(614)312-7528 (c)
Skype:  smolnar1

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