Lost bash directory highlighting after a crash

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http://serverfault.com – Normally commands such as ls and grep offer nice syntax highlighting for me. But my system crashed (running an ubuntu VM) and after I restarted, I no longer have this highlighting, it's all a dreary grey. Nano, however, notably does do it's normal highlighting. I don't know where to start looking for why I don't have directory highlighting any more, or why grep doesn't highlight matched lines any more. (HowTos)