[CentOS] backups and md5 all in one while splitting

Ruslan Sivak rsivak at istandfor.com
Mon Nov 12 22:44:47 UTC 2007

Shad L. Lords wrote:
>> I'm trying to back up our svn repositories, and I found a nice little 
>> backup command line bzip's the backup and creates the md5 hash all in 
>> one:
>> svnadmin dump --deltas /repo |bzip2 |tee dump.bz2 | md5sum >dump.md5
>> The problem is I need to split the backups, so this doesn't really 
>> work. Is there perhaps another way of piping things to allow for 
>> splitting of the backups?  Currently I'm doing something like this
>> svnadmin dump --deltas /repo |bzip2 |split - -b 64m
>> cat *.bz2* | md5sum >dump.md5
>> Is there a way to do this all in one step?
> What about:
> svnadmin dump --deltas /repo | bzip2 | tee >(split -b 64m - dump.bz2.) 
> | md5sum > dump.md5
> -Shad
> _______________________________________________
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> CentOS at centos.org
> http://lists.centos.org/mailman/listinfo/centos

This seems to work well, but I have no idea what it's doing.  Can 
someone walk me through what
tee >(split -b 64m - dump.bz2.) does and why?


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