Need to use ubuntu machine as a media server for PS3.
1. This link explains almost all steps in detail,
1. Media Tomb icon is not displayed in PS3 under videos, music or pictures.
Ans: Restart media server (computer) and PS3.
2. Media Tomb icon is displayed but only PC directory is shown although you have shared appropriate folder from computer and mediatomb is working.
Ans: Restart PS3