On Mon, May 2, 2011 at 7:53 PM, Manish Sinha <mail at manishsinha.net> wrote: > On 05/02/2011 07:47 PM, Tanmoy Kumar Thakur wrote: >> >> i accidentally change ubuntu 11.04 update manager setting, > > Which setting? > > > I think he has accidentally checked/unchecked some of the options in the "software sources" dialog box. Regards Abhinav