[afnog] EXTRACTING A ZIP FILE ISSUE

[Frank Habicht]

hi,

what does the "file" command say ?

man file


Frank


On 10/21/2015 1:49 PM, Grace wrote:
> Dear Stephane,
> 
> I did both -F and -FF before posting this message and here is the error:
> 
> inflating: xx.sql               bad CRC f36776d0  (should be b6dfd2b4)
> 
>  inflating: xx.sql               bad CRC f36776d0  (should be b6dfd2b4)
> 
> On 10/21/2015 12:30 PM, Stephane Bortzmeyer wrote:
>> On Wed, Oct 21, 2015 at 11:25:08AM +0200,
>>   Grace <grace.i at ricta.org.rw> wrote
>>   a message of 28 lines which said:
>>
>>> Archive:  xx.bak.zip
>>> error [xx.bak.zip]:  start of central directory not found;
>>> zipfile corrupt.
>> On Unix, zip has options to fix broken files:
>>
>>         -F
>>         --fix
>>         -FF
>>         --fixfix
>>
>> The good practice is to start with -F (which is more gentle) and, if
>> it fails, try with the harsher -FF. (In your case, giving the error
>> message, you will probably needs -FF.)
>>
>>  From the manual:
>>
>>                Fix  the  zip archive. The -F option can be used if
>> some portions of the archive are miss‐
>>                ing, but requires a reasonably intact central
>> directory.  The input archive is scanned  as
>>                usual,  but zip will ignore some problems.  The
>> resulting archive should be valid, but any
>>                inconsistent entries will be left out.
>>
>>                When doubled as in -FF, the archive is scanned from the
>> beginning and zip scans  for  spe‐
>>                cial  signatures to identify the limits between the
>> archive members. The single -F is more
>>                reliable if the archive is not too much damaged, so try
>> this option first.
>