'tee' splits the stdin into multiple output streams. The first instance of tee you listed gave it a file name and a pipe to output the stdout to.
The second instance did a redirection to a sub-shell which then passed it to 'split' and it also had a pipe. -Ross -----Original Message----- From: [EMAIL PROTECTED] <[EMAIL PROTECTED]> To: CentOS mailing list <centos@centos.org> Sent: Mon Nov 12 17:44:47 2007 Subject: Re: [CentOS] backups and md5 all in one while splitting 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 > _______________________________________________ > CentOS mailing list > CentOS@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? Russ _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos ______________________________________________________________________ This e-mail, and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution or copying of this e-mail, and any attachments thereto, is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender and permanently delete the original and any copy or printout thereof.
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