Get all IPs of a domain in Linux

dig a google.com

dig a google.com +short @8.8.8.8

References
https://superuser.com/questions/152576/how-to-get-all-ips-of-a-domain
https://superuser.com/questions/847575/how-do-i-find-all-known-ips-for-a-given-domain-in-linux