Bash Terminal History Completion in Ubuntu Linux

You know how Google will autocomplete your searches based on searches you've previously done?  Ubuntu Linux can do something similar.  To recall a previously-run command, simply type the first part of the command and use the up and down arrow keys to navigate backward and forward through your command history:

To add this function, make the following changes in the .bashrc file in your user folder:

Water Lichtenberg Figures

Lichtenberg figures and the associated 'electrical treeing effect' have been studied scientifically since the 1700's and known since ancient times. Heinrich Hertz used them in his proofs of James Clerk Maxwell's famous equations, and the physics involved inspired the creation of the photocopier.

They're created when a dielectric — a material that resists the flow of electricity — experiences a catastrophic failure.  As such, they're often found in failed insulation when high-voltage equipment kills itself.

Hit any dielectric with a high enough voltage and you can generate one. The most impressive modern artistic examples are the Beam Trees made with a block of acrylic and a linear particle accelerator:

If you are unlucky enough to be struck directly by lightning, you may receive a Lichtenberg figure tattoo, sometimes called a 'Lichtenberg Flower' (Google Image Search at your own risk).