Download the root file kernel For root the Galaxy A6 2018 SM-A600FN
Model Number : SM-A600FN
Android Version : Pie&Oreo (8.0 & 9.0)
Extract the kernel placed in this post after download and Flash the file in the pda section in the odin software.
This file is only for Galaxy A6 SM-A600FN model, dont use this file for other models .if use it can damaged your device