LD_PRELOAD problem

[phatal]

All times when I try to use LD_PRELOAD I get

ERROR: ld.so: object 'libfakeioctl.so' from LD_PRELOAD cannor be preloaded (cannot open shared object file): ignored.

I get this error everywhere including when try to copy example.

Also I get error nexutil: command not found, but I have fw_bcmdhd.bin in vendor folder . I make all step by step as in instruction, but looks like I forget something? (Nexus5 Nethunter)

[matthiasseemoo]

Did you install libfakeioctl.so to /system/lib and nexutil to /system/bin?

[phatal]

I install them, through nexmon app from play market. Or I need to build them from source manually?

When I install them through app I can run nexutil command only like a /system/bin/nexutil -m true for example, but LD_PRELOAD throw error anyway even if I launch it through LD_PRELOAD=/system/lib/libfakeioctl.so if I trying run directly nexutil -m true i get error command not found

[phatal]

and sometimes I getting __nex_driver_io : error usually after trying to run LD_PRELOAD=/system/lib/libfakeioctl.so aireplay-ng --test wlan0