What is this for?
hBlock is a POSIX-compliant shell script that gets a list of domains that serve ads, tracking scripts and malware from multiple sources and creates a hosts file, among other formats, that prevents your system from connecting to them.
hBlock by default replaces the hosts file of your system, consider making a backup first if you have entries you want to preserve.
Installation
sudo pacman -S hblock
Update the block list
sudo hblock