I've been mining ether to an address but I don't remember where that address came from. I don't remember if I generated it from my command line or if the address was generated from https://www.myetherwallet.com/#generate-wallet How can I access my wallet and verify that I have control over it. I know I'll have to remember my password (if I can) but I don't even know where to go to enter my password and validate it is indeed my wallet and that I can send/receive ether from and to it. Thanks.
If you generated it with MyEtherWallet, then you'll have been prompted to download the keystore file and keep it somewhere safe. (MEW isn't a web wallet - it doesn't keep anything for you.)