output stats from a running dd command to see its progress

watch -n60 --kill -USR1 $(pgrep dd)
if you start a large dd and forgot about statistics, but you still wonder what the progress is this command in an OTHER terminal will show you the way. NOTE: the watch command by itself will not output anything NOTE: the kill command will not kill the process
Sample Output
It will let the running dd command outputting stats like this:

5745+20519787 records in
5745+20519787 records out
38845006016 bytes (39 GB) copied, 3389.22 s, 11.5 MB/s

2
By: bw
2009-12-16 10:35:28

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    (pv -n long_running > output) 2>&1 | zenity --progress
    jordansamuels · 2011-03-24 17:28:33 0
  • I wanted to create a copy of my whole laptop disk on an lvm disk of the same size. First I created the logical volume: lvcreate -L120G -nlaptop mylvms SOURCE: dd if=/dev/sda bs=16065b | netcat ip-target 1234 TARGET: nc -l -p 1234 | dd of=/dev/mapper/mylvms-laptop bs=16065b to follow its process you issue the following command in a different terminal STATS: on target in a different terminal: watch -n60 -- kill -USR1 $(pgrep dd) (see http://www.commandlinefu.com/commands/view/4356/output-stats-from-a-running-dd-command-to-see-its-progress)


    5
    SOURCE: dd if=/dev/sda bs=16065b | netcat ip-target 1234 TARGET: netcat -l -p 1234 | dd of=/dev/mapper/laptop bs=16065b STATS on target: watch -n60 -- kill -USR1 $(pgrep dd)
    bw · 2009-12-16 10:51:06 0
  • Running this code will execute dd in the background, and you'll grab the process ID with '$!' and assign it to the 'pid' variable. Now, you can watch the progress with the following: while true; do kill -USR1 $pid && sleep 1 && clear; done The important thing to grasp here isn't the filename or location of your input or output, or even the block size for that matter, but the fact that you can keep an eye on 'dd' as it's running to see where you are at during its execution.


    8
    dd if=/dev/urandom of=file.img bs=4KB& pid=$!
    atoponce · 2009-04-08 05:56:47 6
  • Functionally the same as the Microsoft Robocopy (https://en.wikipedia.org/wiki/Robocopy) command below but with the benefits of compression and optionally specifying a user. robocopy /e [//host]/source/path [//host]/destination/path Options: -a: archive mode - rescursive, copy symlinks as symlinks, preserve permissions, preserve modification times, preserve group, preserve owner, preserve device files and special files -hh: Numbers in human-readable K=1024 format. Single "h" will produce human-readable K=1000 format -m: don't copy empty directories -z: use compression (if both source and destination are local it's faster to omit this) --progress: Shows progress during the transfer and implies --verbose (verbose output) --stats: Summary after the transfer stops Show Sample Output


    0
    rsync -ahhmz --progress --stats [[user@]host:]/source/path/ [[user@]host:]/destination/path/
    juangmorales · 2014-11-13 18:52:45 0

What Others Think

I think it should be : watch -n 60 kill -USR1 $(pgrep dd)
anuj01 · 424 weeks and 1 day ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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