I know how to add a running application to the dock; but how can I start an Application, which I know must be present, but I don't know the location? For instance, in a Mac, I would search the
$HOME/Applications directory and their sub directories, but Elementary OS doesn't seem to have something similar. The most promising match seems to be a file /usr/share/applications, but there don't seem to be executables in this directory.
As a concrete example, I would like to start the Pantheon file manager, which, according to what I have read, should already come with Elementary OS. I tried a
find / -name 'pantheon-*' 2>/dev/null
to locate this program, and found a few matches (for instance as a directory
/usr/share/doc/pantheon-files), but nothing which would look like a suitable executable.