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A quick shell script that will automatically update a Linux HOSTS file to block domains (ads, malwares, ...). Support multiple hosts sources, initial host file and incorrect/malicious entries checking.
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| #!/usr/bin/env sh | |
| # Filname: update-hosts.sh | |
| # Author: George Lesica <george@lesica.com> | |
| # Description: Replaces the HOSTS file with a customized version that blocks | |
| # domains that serve ads and malicious software, creating a backup of the old | |
| # file. | |
| HOSTS_URL="http://someonewhocares.org/hosts/zero/hosts" | |
| NEW_HOSTS="hosts" | |
| HOSTS_PATH="/etc/hosts" | |
| # Check for root | |
| if [ "$(id -u)" -ne "0" ]; then | |
| echo "This script must be run as root" 1>&2 | |
| exit 1 | |
| fi | |
| # Grab hosts file | |
| wget -O $NEW_HOSTS $HOSTS_URL | |
| # Backup old hosts file | |
| cp -v $HOSTS_PATH ${HOSTS_PATH}.bak$(date -u +%s) | |
| cp -v $NEW_HOSTS $HOSTS_PATH | |
| # Clean up old downloads | |
| rm $NEW_HOSTS* |
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