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). Tram number 17 (towards Sinsen-Grefsen St.) will take you to Heimdalsgata. Walk back the direction the tram came from, cross the bridge, pass Anker Hotel and you will find Anker Hostel on the right side of the street.
Walking distance from Oslo Bus Terminal to the hostel: 7–8 minutes