On Sun, Oct 14, 2007 at 04:30:16PM -0400, centos at unixplanet.biz wrote: > Hello > > I was copying some files from one server to other, > that I relized the total file size ( sum of all files ) > in one server is a bit more than the one that copied from > ( about 6 when I do du -s ) "du" takes into account block sizes and so on, so may not be the same on two different machines. "ls -l" shows the exact size per file. > is there any more accurate way to make sure of integrity of the file. > ( other than pgp or signature ) md5sum will generate an MD5 checksum on each file. It's typically what is used by larger FTP sites to ensure you've downloaded a non-corrupt file. It's _possible_ for two seperate files to have the same checksum but the chances of this happening by accident are 1 in 2^128 - very unlikely :-) -- rgds Stephen