Hashcat 4.1.0 not using AMD RX 570 & amdconfig: command not found

[d5y9nu]

According to askubuntu, AMDconfig uses fglrx. to install fglrx, please type 

Code:

sudo apt-get install fglrx

Thanks, but

Code:

$sudo apt-get install fglrx

Reading package lists... Done
Building dependency tree      
Reading state information... Done
E: Unable to locate package fglrx

It doesn't seem to be available in the latest LTS of Ubuntu.