Arriving with bus
Most long distance buses arrive in Oslo Bus Terminal. There is a taxi rank by the terminal. If you want to take public transportation you have to walk to Jernbanetorget (by the Central Station). Take tram number 11 or 12 (direction Kjelsås), and tram 17 or 18 (direction Grefsen). Exit the tram at Nybrua, and you will see Anker Hostel and Anker Hotel on the left side of the street.
Walking distance from Oslo Bus Terminal to the hostel: 7–8 minutes