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copy working directory and compress it on-the-fly while showing progress

Terminal - copy working directory and compress it on-the-fly while showing progress
tar -cf - . | pv -s $(du -sb . | awk '{print $1}') | gzip > out.tgz
2009-12-18 17:09:08
User: opertinicy
Functions: awk du gzip tar
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copy working directory and compress it on-the-fly while showing progress

What happens here is we tell tar to create "-c" an archive of all files in current dir "." (recursively) and output the data to stdout "-f -". Next we specify the size "-s" to pv of all files in current dir. The "du -sb . | awk ?{print $1}?" returns number of bytes in current dir, and it gets fed as "-s" parameter to pv. Next we gzip the whole content and output the result to out.tgz file. This way "pv" knows how much data is still left to be processed and shows us that it will take yet another 4 mins 49 secs to finish.

Credit: Peteris Krumins http://www.catonmat.net/blog/unix-utilities-pipe-viewer/

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What others think

credit to peteris krumins

Comment by opertinicy 179 weeks ago

As tar can also compress you can save a pipe here. Also 'out' is being redirected to pwd, which is the pwd for tar. I would probably do the following (using zsh glob qualifier for the output filename ... but for bash you could use ${key##*/} or what-have-you):

tar cfJ - . |pv --size $(du -sb jargon-wl|cut -f1) > ~/backup/${$(pwd):t}.tar.xz

(fingers crossed the content manager here don't munge the above command)

Comment by khayyam 7 weeks and 2 days ago

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