How do I find a renamed wallet whose name I can't remember? I bought BTC in 2011 and renamed my wallet.dat to something else that I cannot remember. How can I find my wallet file on my computer? I'm prepared to use the command line and scripting.
Place to start - use the linux "file" command, which will show the following for a bitcoin wallet (at least in the client I use)

wallet.dat: Berkeley DB (Btree, version 9, native byte-order)

So - you could run something like:

find / -type f exec file '{U}' \; | grep "Berkeley DB"

That would be a start!