update-motd-trashes

#!/bin/bash

du -s /media/HDD/.Trash-0/ /home/MYUSER/.local/share/Trash/ |awk '
   BEGIN { print "  Trashes" };
   {
     if ($1 > 10000000)
       {print "  "$2 "\t\t" $1/1000000.0 " GB"}
     else
       {print "  "$2 "\t" $1/1000.0 " MB"}
   }
   END { print "" }' CONVFMT="%.2f"