All About BTC, LTC, ETH mining as well as other alternative crypto currencies
You can of course import your Ethereum wallet generated with Ether Wallet, even if you printed a paper wallet, into geth for example with your unencrypted private key that you need to save into a file. All you have to do is to run the geth client with the following command line where instead of keyfile you need to type the file name of the file you have saved your unencrypted private key in:
geth account import keyfile
You will be asked to enter a password in order to encrypt the key when your account is being imported in geth and the password you enter will be needed in order for you to unlock your account for executing transactions in the future. So make sure you remember your password and then do a backup of your Ethereum wallet in geth.