A tool that automates subdomain enumeration by running various tools and combining the results. Finally giving all the alive subdomains.
Install Go:
1. https://www.digitalocean.com/community/tutorial_collections/how-to-install-go
2. sudo apt install golang-go
Install sub3num:
git clone https://github.com/saharshtapi/sub3num.git
cd sub3num
chmod +x *.sh
sudo ./install_tools.sh
./sub3num <target_domain>