"No command" in any Recovery topic

I have flashed recovery for bootloader 4.4 although i do not know which my bootloader version is (mine runs on kitkat 4.4). "No command" appeared. Then i flashed bootloader 4.3 and recovery for bootloader 4.3, "No command" still appeared. Now i do not what my bootloader version is and how to solve this problems :(, i really want to root phone to install my apps, anyone help me ? Thanks.

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