# do some "forward" DNS lookups.  "man dig"

dig www.google.com
dig @ns1.google.com www.google.com
dig any @ns1.google.com google.com
dig any @june.cs.washington.edu cs.washington.edu

# do a reverse DNS lookup
dig -x 128.95.4.1

# run a trace of the DNS lookup path, disabling recursion as a side-effect
dig +trace www.cs.washington.edu

# run netcat to open a listening socket on port 5543
nc -l 5543