rsync_error.sh

# protocol version mismatch -- is your shell clean?
# (see the rsync man page for an explanation)
# rsync error: protocol incompatibility (code 2) at compat.c(176) [Receiver=3.1.1]
# ^ this was caused because of bashrc configuration which had some output, we can prevent this with:
# add this at the top of bashrc file on your end-point
# this will do nothing if runnig not interactively
case $- in
    *i*) ;;
      *) return;;
esac