Watch the progress of 'dd'

dd if=/dev/zero | pv | dd of=/dev/null
Sample Output
1.25GO 0:00:03 [ 434MO/s] [  <=>                                                      ]

By: richard
2010-05-14 16:58:42
dd dd pv

4 Alternatives + Submit Alt

  • 12
    dd if=/path/inputfile | pv | dd of=/path/outpufile
    lucafaus · 2010-12-02 18:11:42 2
  • The 'dd' command doesn't provide a progress when writing data. So, sending the "USR1" signal to the process will spit out its progress as it writes data. This command is superior to others on the site, as it doesn't require you to previously know the PID of the dd command. Show Sample Output

    pkill -USR1 ^dd$
    atoponce · 2010-05-14 16:25:01 4
  • Adjust "sleep X" to your needs. *NOTE: First sleep is required because bash doesn't have a "post-test" syntax (do XXX while). Show Sample Output

    dd if=/path/to/inputfile of=/path/to/outputfile & pid=$! && sleep X && while kill -USR1 $pid; do sleep X; done
    cyrusza · 2010-12-02 15:07:18 3
  • dcfldd is a forensic version of dd that shows a process indicator by default.

    dcfldd if=/dev/zero of=/dev/null
    twjolson · 2010-05-14 17:37:03 3

What Others Think

as cool as this is, it relies on a utility that isn't standard across platforms, and isn't installed by default on any system.
atoponce · 639 weeks and 4 days ago
dd if=/dev/zero | pv > /dev/null
dash · 564 weeks and 2 days 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?

You must be signed in to comment.

What's this? is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Share Your Commands

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.


Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for: