Watch Progress of dd with pv

Less confusion with dd! Watch dd with pipe viewer (pv)

Here we run it as sudo, such that both sides of pipe are executed as root

sudo -- sh -c \'pv /path/to/disk.iso | dd of=/dev/disk2\'

-- signifies end of parameters to sudo, -c tells sh to execute passed command.

* If we were instead to run sudo pv /path/to/file | dd of=/path/to/dest pv would be run as root, but dd would not, causing command to fail if calling user doesn't have write privileges to dest.