how to save back /bin

[vichy]

hi:

2011/9/17 Koh Choon Lin <2choonlin at gmail.com>:
> Hi
>
> On Fri, Sep 16, 2011 at 10:47 PM, vichy <vichy.kuo at gmail.com> wrote:
>> Dear all:
>> I accidentally delete all the files below /bin.
>> I reboot my livecd and copy /bin in livecd to my partition.
>> but it complaint that libc.6.so cannot find glibc2.0.
>>
>> I don't want to to reinstall my system and I just want to know is
>> there easiest way to restore /bin/*.
>> Appreciate your help,
>
> You can try to reinstall over your existing partition. All your
> configuration would be intact. Should take less than half an hour.
so you mean I only need to reinstall the ubuntu on the same partition,
after rebooting, everything will be like before?
No need to apt-get install packages I installed before?
Appreciate your help,