How to clear DNS cache in various OS

There are a variety of reasons why (updated a DNS record, issues with resolver, etc) but sometimes a good diagnostic step is to clear out the dns cache.

Each operating system (and even versions / distributions in some cases) have a different method

OSX 10.10 > sudo discoveryutil udnsflushcaches

OSX 10.9 > dscacheutil -flushcache; sudo killall -HUP mDNSResponder

OSX 10.7 – 10.8 > sudo killall -HUP mDNSResponder

OSX 10.5 – 10.6 > sudo dscacheutil -flushcache

Windows > ipconfig /flushdns

Linux - There are many different distros and versions here, but one of the following should work > /etc/init.d/named restart

/etc/init.d/nscd restart

service nscd reload

sudo /etc/init.d/dnsmasq restart

service dnsmasq restart

Fixing common Mac problems

Apple Discussions Support Forum - You can select the topic by OS, program, hardware or just type your problem into the search box.

CNET’s MacFixIt Feed - Tech blog CNET keeps tabs on all their OS X-related updates with the MacFixIt blog. Head here to search for updates, cool features and troubleshooting.

Quora - Apple Products - I’ve linked directly to the Apple-Products section, but really just punch in whatever you are having a problem with and search. Answers are provided by other users of the service, I don’t tend to use this all that much but others swear by it.

The MacRX Category on Cult of Mac - Cult of Mac keeps it simple: All Mac, all the time. Follow their troubleshooting-specific MacRX category to get updates on everything from good Mac maintenance and un-deleting files to how to fix start-up problems and get your Mac running fast.

Macworld Forums - Typical forum site with categories, search, etc.

macnn - Typical forum site with categories, search, etc.

reddit list of apps - large list of apps done by reddit users

fluid - Make standalone apps out of websites

opensource mac - Free Mac software

vienna - desktop rss reader

gimp on osx

OSX Daily Tips

SuperDuper - Drive Cloning software


Onyx - System diags

Disk Inventory Deluxe - shows space used



Reset Password on 10.4, 10.5 and 10.6

Reset Password on 10.7 and 10.8

Reset keychain

Recover saved WIFI password


Adjusting Keyboard Backlight

Refurb.Me - Lets you track refurb deals on the Apple store

OS X Server Caching

Thread about OSX Server

Hidden Mavericks Pictures

Apple Video adapters and cables

This copy of the Install OS X Mavericks application can’t be verified Fix -