I am reading an development guide of Facebook Developers at here
It says that I must use keytool to export the signature for my app such as:
keytool -exportcert -alias androiddebugkey -keystore ~/.android/debug.keystore | openssl sha1 -binary | openssl base64
I do not know how to find the keytool in order to run it. I tried to open a Windows command prompt and paste the above command, but it did not work.
