1. Target a device by serial number
-s option followed by a device name to select on which device the
adb command should run.
-s options should be first in line, before the command.
adb -s <device> <command>
adb devices List of devices attached emulator-5554 device 02157df2d1faeb33 device adb -s emulator-5554 shell
adb devices -l List of devices attached 06157df65c6b2633 device usb:1-3 product:zerofltexx model:SM_G920F device:zeroflte LC62TB413962 device usb:1-5 product:a50mgp_dug_htc_emea model:HTC_Desire_820G_dual_sim device:htc_a50mgp_dug adb -s usb:1-3 shell
2. Target a device, when only one device type is connected
You can target the only running emulator with -e
adb -e <command>
Or you can target the only connected USB device with -d
adb -d <command>