By foot from Ajaccio to Ajaccio (city)
The best way to explore Ajaccio is on foot. When you leave the cruise terminal walk to the left. After 500 meters you reach the fishing port opposite Place Foch, the center of Ajaccio. From there, all the highlights are within walking distance.
TIP: If you want to explore other places on the island, take a taxi or public transport, but realize that the timetables often don't match with the ones of the cruise lines.