[MacTUG] Flush DNS cache in Lion and Mountain Lion - Mac OS X Hints

[Marlon A. Griffith]

"""
We have a hint for 10.5, which is also valid for 10.6, but we're not up
to date.

So, as a reminder, to flush the DNS cache in Mac OS X 10.5 and 10.6, run
this command in Terminal:

sudo dscacheutil -flushcache

To do the same in 10.7 and 10.8, run this command:

sudo killall -HUP mDNSResponder

As Apple points out, you might need to do this in the following situation:

"OS X keeps a local cache of resolved DNS queries for a time defined by
the DNS server, but sometimes it may be necessary to reset the cache
immediately and re-query a DNS server. For example, you might do this
after an entry on the server is changed or a new entry is added."

http://hints.macworld.com/article.php?story=20120808001623238
"""