$ curl cheat.sh/
# host
# Lookup Domain Name Server.
# More information: <https://manned.org/host>.

# Lookup A, AAAA, and MX records of a domain:
host domain

# Lookup a field (CNAME, TXT,...) of a domain:
host -t field domain

# Reverse lookup an IP:
host ip_address

# Specify an alternate DNS server to query:
host domain 8.8.8.8

$
Follow @igor_chubin cheat.sh tldr