The executable file name for fbreader is FBReader.
For future reference, you can useIs there a way to find out what is really happening?
pkg info -l <pkgname> to see which files it contains. Sometimes the actual name of the executable isn't obvious. -l, --list-files
Display all files installed by pkg-name.
Good call, but I'd also suggest adding -x so that you don't have to type out the full name.Next time, think to usepkg info -l NameOfThePackage.