A shell script that updates your /etc/hosts file with adblock, malware blocking, and malicious URLs blocking based on https://github.com/StevenBlack/hosts.

update_hosts.sh

#!/bin/bash

# Set the URLs for the hosts files
HOSTS_URLS=(
    "https://raw.githubusercontent.com/StevenBlack/hosts/master/hosts"
    "https://raw.githubusercontent.com/StevenBlack/hosts/master/alternates/fakenews-gambling-only/hosts"
    "https://raw.githubusercontent.com/badmojr/1Hosts/master/Lite/hosts.txt"
    "https://tgc.cloud/downloads/hosts.txt"
    "https://raw.githubusercontent.com/d3ward/toolz/master/src/d3host.txt"    
    # Add more URLs as needed
)

# Set the path to the hosts file on MacOS
HOSTS_FILE="/etc/hosts"

# Create a timestamp for the backup filename
TIMESTAMP=$(date "+%Y_%m_%d_%H-%M-%S")
BACKUP_FILE="/Users/renesansz/backups/etc/hosts.backup_$TIMESTAMP"

# Create a temporary hosts file
TEMP_HOSTS_FILE="/tmp/temp_hosts"

# Backup the existing hosts file
sudo cp "$HOSTS_FILE" "$BACKUP_FILE"

# Loop through each URL and append the content to the temporary hosts file
for URL in "${HOSTS_URLS[@]}"; do
    # Download the hosts file and append to the temporary file
    sudo curl -o - "$URL" >> "$TEMP_HOSTS_FILE"
done

# Remove lines starting with '#' and whitespace
sudo sed -i '' '/^#/d' "$TEMP_HOSTS_FILE"
sudo sed -i '/^0\.0\.0\.0 0\.0\.0\.0$/d' "$TEMP_HOSTS_FILE"

# Replace the existing hosts file with the temporary hosts file
sudo mv "$TEMP_HOSTS_FILE" "$HOSTS_FILE"

echo "Hosts file updated successfully."

sudo dscacheutil -flushcache;sudo killall -HUP mDNSResponder

echo "DNS cache flushed."