How to monitor progress of linux command dd.

If you start a dd command from the command prompt, there is no progress output. The easiest way to get the current dd progress is by executing following commmand from different terminal

sudo kill -USR1 $(pgrep ^dd)

The progress will be printed in the dd terminal. To print the progress every 5 seconds use

watch -n5 'sudo kill -USR1 $(pgrep ^dd)'

For dd version 8.24 and above the following command line will print the progress

dd status=progress  if=xxx of=yyy