I'm running 'rsync -a -i /foo /bar'. Every now and then I would like to know what exactly rsync is doing at the moment without having the -v output all the time. Is it possible to increase the verbosity of running processes e.g. by sending a kill signal?
rsync documentation does not describe such behaviour, nor is there a (proper or de-facto) standard signal to send to a process in order to modify its verbosity.
However thanks to the incremental nature of
rsync you should be able to abort a running
rsync with Ctrl+C and re-run it with '-v' and not lose much time as a consequence.