DNS flush

Sometimes you may need to do a DNS flush, say after a mysterious DNS network issue. Here are the commands.

Mountain Lion / Lion
sudo killall -HUP mDNSResponder

Leopard
sudo dscacheutil -flushcache

Tiger
lookupd -flushcache

Windows
ipconfig /flushdns

Run a nslookup or ping to check if you are indeed getting the correct IP(s) from the DNS server(s).

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s