# add spacer tile
defaults write com.apple.dock persistent-apps -array-add '{"tile-type"="spacer-tile";}'

# move doc location start/middle/end left/bottom/right
defaults write com.apple.dock pinning -string start

# use suck effect to minimize
defaults write com.apple.dock mineffect suck

# add rfecents folder to dock
defaults write com.apple.dock persistent-others -array-add '{ "tile-data" = { "list-type" = 1; }; "tile-type" = "recents-tile"; }'

# then
killall Dock