Accidental Discoveries

Here I compile neat things I have initially discovered by accident.

• GNU Screen's copy mode.

If you do C-a [, you will enter screen's "copy mode." You can move the cursor around with vi-like keybindings (or the arrow keys) and mark the beginning of the text you want to copy with space. Hit enter when you've selected everything you want, and you can then paste it anywhere within screen with C-a ].