Root Cant go in fastboot mode in SM-J400F

[lib]

I am trying to root my Samsung SM-J400f but I just cant get into fastboot mode. As soon as I type following command :-

adb reboot bootloader

My device just reboots and doesn't enter into fastboot or any special mode. I have checked "OEM unlock" option in develop options. Also I tried entering into fastboot mode by pressing Volume up + home + power keys but it just starts normally like nothing have just happened. Pls help me. Btw, I am using ArchLinux

 

[ocnbrze]

welcome to AF!!!!!!

did you install the drivers on your pc? did you enable usb debugging?

here's a guide that might help:
https://www.xda-developers.com/how-to-install-twrp/