I am working on a file which I have to split at block 560 using
dd if=wholefile of=file.gz skip=560
wholefile is made up of a ascii cpio archive pre-SVR4 attached to a 
gzip compressed file
I will decompress and modify file.gz and then compress again
Then I think I can split again wholefile with
dd if=wholefile of=file.cpio block=560 in order to obtain the first 
part of the file.
Now I have to join again file.cpio and the modified file.gz to 
reconsitute wholefile.
How can I do it?
I suppose I can use cat, but how?
What I have to be aware of?
Thank you very much for your help.
cheers
brusberri



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