Find a public Google group for a particular host. Some of these groups contain sensitive information. The tool runs against a list of hosts and returns all public groups.

googlegroups.sh

#!/bin/bash

# Find a public Google group for a particular host. 
# Some of these groups contain sensitive information. 
# The tool runs against a list of hosts and returns all public groups.

while read domain; do
    if curl -LIs "https://groups.google.com/a/$domain" | grep "overview" > /dev/null; then
        echo "[+] https://groups.google.com/a/$domain/forum/#!overview"
    fi
done < $1

Thanks for the feedback. I was focusing on efficiency in a single threaded case. Making the same request run in parallel would be faster, but still inefficient.