synaptic manager not open

[smart]

E: Malformed line 1 in source list /etc/apt/sources.list.d/virtualbox.list (URI parse)
E: The list of sources could not be read.
please give me your suggestions how can i remove this error ?

[xenopeek]

Please share the output of the following command:

Code: Select all

cat /etc/apt/sources.list.d/virtualbox.list

Also, I'm assuming you tried to install VirtualBox manually by adding a ppa or a repository. Correct?

[smart]

yes i am trying to install a virtual box.now through a synaptic manager when i select the package and the error come "fix the broken package first " more detail is ( E: Unable to correct problems, you have held broken packages.
E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.
E: Unable to correct dependencies )
plz give me your suggestion.