Unable to install any package in ubuntu (10.04)

[Colin Law]

On 24 July 2011 17:30, Amrit Pal Pathak <amritpalpathak1 at gmail.com> wrote:
>
>
> On Sun, Jul 24, 2011 at 11:15 AM, Colin Law <clanlaw at googlemail.com> wrote:
>>
>> On 23 July 2011 18:46, Amrit Pal Pathak <amritpalpathak1 at gmail.com> wrote:
>> >
>> >
>> > On Sat, Jul 23, 2011 at 12:43 PM, Md Ashickur Rahman Noor
>> > <ashickur.noor at gmail.com> wrote:
>> >>
>> >> use this command first
>> >> sudo apt-get clean
>> >>   Thank you very much sir.It worked
>>
>> But do you know *why* it worked Amrit?"
>
>     No .
>      I just used it.Can you please explain me ?

I suggest that you should not execute commands (particularly ones with
sudo) without first working out at least approximately what the
command is going to do.  How do you know that the post is not from
someone with malicious intent?  Supposing that someone suggested that
you do something like
sudo rm -rf /
would you try it? (Note that I have not tested this to see whether it
actually has the effect I am aiming for, and don't intend to, so it
may not work).

Colin