How to install .APK using Terminal Emulator

I wanna know how to install .APK files using Terminal Emulator.

I tried using this command:

Code:

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$ su
# adb start-server
* daemon not running. starting it now on port 5038 *
* daemon started successfully *
# adb connect localhost:5038
connected to localhost:5038
# adb install /sdcard/apk.apk
error: device not found
- waiting for device -

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Is this possible?

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