todd@librem-13v2:~$ sudo apt-file update
Hit:1 http://repo.puri.sm/pureos green InRelease
Reading package lists... Done  
Building dependency tree       
Reading state information... Done
All packages are up to date.
todd@librem-13v2:~$ apt-file search purebrowser
Finding relevant cache files to search ...E: The cache is empty. You need to run "apt-file update" first.
todd@librem-13v2:~$ apt-file search olive
Finding relevant cache files to search ...E: The cache is empty. You need to run "apt-file update" first.
todd@librem-13v2:~$