IBP - Beacon tool
A good tool for HF propagation is the IARU beacons sistem mounted around the world on 20m, 17m, 15m, 12m and 10m bands. The beacons use standard vertical omnidirectional antennas and 100w power input.
IBP main window
Emission is cyclically according to a timetable so we need for a software to know what beacon transsmit on a time moment. A very simple and good tool is IBP software, a shell program witch can be found in all distro's repositoryes and on homepage.