What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again.

Delete that bloated snippets file you've been using and share your personal repository with the world. 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.

If you have a new feature suggestion or find a bug, please get in touch via http://commandlinefu.uservoice.com/

Get involved!

You can sign-in using OpenID credentials, or register a traditional username and password.

First-time OpenID users will be automatically assigned a username which can be changed after signing in.

Universal configuration monitoring and system of record for IT.

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.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

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:



May 19, 2015 - A Look At The New Commandlinefu
I've put together a short writeup on what kind of newness you can expect from the next iteration of clfu. Check it out here.
March 2, 2015 - New Management
I'm Jon, I'll be maintaining and improving clfu. Thanks to David for building such a great resource!

Top Tags



dd with progress bar

Terminal - dd with progress bar
dd if=/dev/nst0 |pv|dd of=restored_file.tar
2010-04-07 09:21:18
User: oernii2
Functions: dd
dd with progress bar

piping through 'pv' shows a simple progress/speed bar for dd. This is a replacement for my otherwise favorite 'while :;do killall -USR1 dd;sleep 1;done'


There are 10 alternatives - vote for the best!

Terminal - Alternatives

Know a better way?

If you can do better, submit your command here.

What others think

Is the pv command system specific? I've checked a bunch of my machines and have not found it.

What system was this tested on?


Mikel King

Comment by mikelking 320 weeks and 5 days ago

pv is a program available at this address: http://www.ivarch.com/programs/pv.shtml

it has been packaged for a few linux distributions and is written in C.

Comment by bwoodacre 320 weeks and 5 days ago

On debian/ubuntu/chubuntu:

sudo aptitude install pv

Comment by point_to_null 320 weeks and 5 days ago

for centos/rhel its available in rpmforge repo

Comment by oernii2 291 weeks and 1 day ago

A slight improvement on the above which will show a more useful progress bar by specifying the size parameter to pv:

% dd if=input_file | pv -s `du -bc input_file | cut -f 1 --output-delimiter=" " | head -1` | dd of=output_file

Comment by baranovich 196 weeks and 5 days ago

A simpler way

pv -tpreb input_file | dd of=output_file
Comment by elija 158 weeks ago

Your point of view

You must be signed in to comment.