The "adb push" command is used to push files to your device.
Typing "adb push" won't do anything besides displaying all the adb functions.
To push something, your command must be something like "adb push whateverthefileis system/bin" the "system/bin" is the destination where it is to be pushed, for example if you want to push an app you do, "adb push android.apk system/app"
Make sure your drivers for phone is installed properly.
Sent from my Nexus F...Fi...Fii...Ahem...*clears throat*... Five.