I guess either "Ubuntu Software center" or "Synaptic Package manager" was opened at that time. If simultaneously either of those programs are running, then there will be a conflict during installing softwares. At a time you must use one of them. To resolve that Close all programs, then open the terminal and do the things again.
What kind of message did you get when you tried to visit my blog? -- অভ্রনীল ::: Ovroniil http://ovroniil.wordpress.com/ -- Ubuntu Bangladesh | http://ubuntu-bd.org [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bd
