If you're installing a locally downloaded package with apt-get, you need to provide the path to the file (even if it's in your current working directory), i.e.: sudo apt-get install ./ucsf-chimerax_1.2.5-1_amd64.deb -- Tristan ________________________________ From: ChimeraX-users <chimerax-users-bounces@cgl.ucsf.edu> on behalf of Stephen P. Molnar via ChimeraX-users <chimerax-users@cgl.ucsf.edu> Sent: 09 October 2021 12:50 To: goddard <goddard@sonic.net>; ChimeraX Users Help <chimerax-users@cgl.ucsf.edu> Subject: Re: [chimerax-users] ProblemI am attempting he installation of ChmimeraX Installing ChimeraX on Debian mv-10 An interesting suggestion, but comp@AbNormal:~/Downloads/ChimeraX$ sudo apt-get install ucsf-chimerax_1.2.5-1_amd64.deb [sudo] password for comp: Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package ucsf-chimerax_1.2.5-1_amd64.deb E: Couldn't find any package by glob 'ucsf-chimerax_1.2.5-1_amd64.deb' E: Couldn't find any package by regex 'ucsf-chimerax_1.2.5-1_amd64.deb' comp@AbNormal:~/Downloads/ChimeraX$ None of the missing packages are available via Synaptic. On 10/08/2021 04:10 PM, Tom Goddard wrote: sudo apt-get install ~/Downloads/ucsf-chimerax_1.2.5-1_amd64.deb -- Stephen P. Molnar, Ph.D. www.molecular-modeling.net<http://www.molecular-modeling.net> 614.312.7528 (c) Skype: smolnar1