I am trying to install virtual box on Ubuntu 11.10
I tried the procedure given in following link:
But, when I do sudo apt-get update it is showing failed message as follows:
W: Failed to fetch http://download.virtualbox.org/virtualbox/debian/dists/oneiric/Release Unable to find expected entry 'contrib/source/Sources' in Release file (Wrong sources.list entry or malformed file)
E: Some index files failed to download. They have been ignored, or old ones used instead.
If anyone aware of this bug please help me soon.