dig

#To run dig (domain information groper)
dig domain]

#To just get the ip address
dig [domain] +nocomments +noauthority +noadditional +nostats 
OR
dig [domain] +noall +answer
OR
dig [domain] +short

#To use a specific query type
dig -t [query type] [domain] [options]
OR
dig [domain] [query type] [options]

#To view ALL DNS record types use query ANY
dig -t ANY [domain] [options]
OR
dig [domain] ANY [options]

#To do a DNS reverse look up 
dig -x [ip address] +short

#To use a specific DNS server
dig @[specific DNS] [domain]

#To do a bulk DNS query (where file.txt has all the domains, one to a line)
dig [domain1] [options] [domain2] [options]
OR
dig -f file.txt [options]