control-C and yum update

[Mr Gabriel]

On 04/01/2010 12:14, Sam Varshavchik wrote:
> Paul Allen Newell writes:
>
>> A quick question which is hopefully just "an education request" ...
>>
>> While reinstalling f12 on a machine that I "messed up", I was 
>> following all my notes and directions and reached the point where the 
>> install was successful and it was time to update. I did a "su -l" and 
>> then typed "yum update". I realized I had forgotten something and 
>> immediately did a "control-C" in the terminal that I had executed the 
>> "yum update". To my surprise, it ignored it until it got to the first 
>> confirm and then proceeded to kill the process. No problem as the 
>> update was stopped but ...
>>
>> I though "control-C" was an immediate kill of whatever was running 
>> and was wondering why yum didn't stop when I tried to kill it.
>
> Probably because if you interrupt packages in the middle of updating, 
> you have an excellent chance of FUBARing your entire system.
>
> This has been a long standing problem with rpm. If you interrupt a 
> long update, you'll end up with both the old and the new version of 
> affected packages installed. That's always fun to clean up.
>
> Don't do that.
>
> You have to hit Crtl-C twice! not just the once, and within' five 
> seconds of each other