Can't boot on Android, And I Am Stuck On Recovery Mode

[The Command Line]

I was using T.W.R.P, and mistakenly flash the (recovery.img) onto Boot, and that's it whenever i boot up i can't boot Android anymore, just a black screen, but i am able to boot onto Recovery and Download Mode. The device is still recognizable to my Computer.

 

[Rukbat]

What you do next depends on the phone. If you can unlock the bootloader (which, if you can, is probably unlocked at this point), and the ROM image file includes individual files with sane-sounding names, just fastboot flash boot boot.img (if it's got an a/b setup, change flash boot to flash boot_a, then do it again with boot_b, so you'll have a bootable phone regardless of which side you're on).