Been using these commands quite a bit recently as I experiment with moving the panels about. gconftool --recursive-unset /apps/panel pkill gnome-panel from Watching the Net
I created the twitter feed based on a JSON feed of the geographic location of the minibus provided by my colleague. I then compare the coordinates of the minibus with a set of bounding boxes stored in a database. If the bus is within squares defined in the database, then the pre-defined description is sent to twitter so that anyone following the bus can receive updates as to where it is.
du -m | sort -nr | head du -m summarises disk usage from current path recursively (in megabytes) sort -nr sorts the output numerically in reverse head restricts output to the top 10 lines adapted from Linux Reviews