I want to make a USB bootable by cloning an image. I did some research and I haven't found a satisfactory way of making dd provide some feedback back to the console of how the progress is going.
Is there a way, built into the command to do this, aside from polling the PID via the ps command?
02 Answers
If you read man dd, it refers you to info coreutils 'dd invocation' which says, in part,
Sending an INFO signal to a running dd process makes it print
I/O statistics to standard error and then resume copying. In the
example below, dd is run in the background to copy 10 million blocks.
The kill command makes it output intermediate I/O statistics, and
when dd completes normally or is killed by the SIGINT signal, it
outputs the final statistics.
$ dd if=/dev/zero of=/dev/null count=10MB & pid=$! $ kill -s INFO $pid; wait $pid 3385223+0 records in 3385223+0 records out 1733234176 bytes (1.7 GB) copied, 6.42173 seconds, 270 MB/s 10000000+0 records in 10000000+0 records out 5120000000 bytes (5.1 GB) copied, 18.913 seconds, 271 MB/sOn systems lacking the INFO signal dd responds to the USR1signal instead, unless the POSIXLY_CORRECT environment variable is
set.
You can also try the status=progress option, which will display the info in real time:
[~]$ dd if=/dev/zero of=/dev/null count=10MB status=progress
4708234752 bytes (4.7 GB, 4.4 GiB) copied, 4 s, 1.2 GB/s
10000000+0 records in
10000000+0 records out
5120000000 bytes (5.1 GB, 4.8 GiB) copied, 4.3516 s, 1.2 GB/s
[~]$ There are several solutions available via google search.
From
(pv -n /dev/sda | dd of=/dev/sdb bs=128M conv=notrunc,noerror) 2>&1 | dialog --gauge "Running dd command (cloning), please wait..." 10 70 0You may have to install dialog and pv
sudo apt-get install pv dialog
