General construction of the command rsync in unix systems: Command Source Target
# Options r=recursive z=zipped v=verbose
rsync -rzv --no-perms fileadmin/ user@host:/var/www/site/public/fileadmin/
# Max file size 1.5MB and ignore fileadmin/_processed_/ folders and files
rsync -rzv --no-perms user@host:/var/www/site/public/fileadmin/ fileadmin/ --max-size=1.5m --exclude=_processed_
# Use only defined file extensions
rsync -rzv --no-perms . user@host:/var/www/powermail/ --max-size=0.8m --include="*.jpg" --include="*.png"
Happy syncing