Linux has very simple commands, that at the time of an attack, we can use to obtain information quickly. All domains have a lot of useful public information, which we can consult easily with the following commands.
The host command allows you to search DNSs.
Dig (Domain Information Groper) is a command-line tool that searches DNS records.
The ping command allows you to verify the status of a specific connection or local host.
ping -c 4 infosecaddicts.com
You can indicate how many times you want it to be repeated or do it this way “ping infosecaddicts.com” to make it infinite.
ping -c 8 infosecaddicts.com
The traceroute command determines the route that an Internet Protocol (IP) packet takes to reach its destination.
The whois command is the one I like the most because, with it, I can get a lot of information such as who it is, phones, mail, address…
After knowing the Linux commands mentioned here, I invite you to perform proper tests, with the desired domain and analyze all the information that you will obtain.