To find a list of installed packages use the dpkg command and its –get-selections switch. This is rather long so narrow it down with grep
dpkg --get-selections | grep w-scan
[blacksample text=”output:”]w-scan install
This gem gives us a list of the files from the package and where they were installed
dpkg -L w-scan
/. /usr /usr/bin /usr/bin/w_scan /usr/share /usr/share/doc /usr/share/doc/w-scan /usr/share/doc/w-scan/README /usr/share/doc/w-scan/README.file_formats.gz ...
To get a list of available packages use apt-cache and its search sub-command. You can use a regex as the pattern here so no need for grep.
apt-cache search 'w[-_]scan
qsstv - Qt-based slow-scan TV and fax w-scan - Channel scanning tool for DVB and ATSC channels