DNS Archives - Garbage In Garbage Out https://gigoblog.com/tag/dns/ Tech tips & other words Mon, 03 Nov 2025 17:28:32 +0000 en-US hourly 1 Clear Mac OS DNS cache via command line https://gigoblog.com/2025/10/28/clear-dns-cache-in-mac-os-via-command-line-all-versions/ https://gigoblog.com/2025/10/28/clear-dns-cache-in-mac-os-via-command-line-all-versions/#respond Tue, 28 Oct 2025 10:52:59 +0000 http://www.gigoblog.com/?p=631 The method for clearing or flushing the local cache in Mac OS has changed over the years. Here are all the Mac OS versions on one page that details how to clear Mac OS DNS cache via command line. TLDR; Add this alias to your .zshrc file: alias flushdns="sudo killall -HUP mDNSResponder;sudo killall mDNSResponderHelper;sudo dscacheutil […]

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]]> https://gigoblog.com/2025/10/28/clear-dns-cache-in-mac-os-via-command-line-all-versions/feed/ 0 Clear the DNS cache on Mac OS https://gigoblog.com/2014/05/19/clear-dns-cache-on-os/ https://gigoblog.com/2014/05/19/clear-dns-cache-on-os/#comments Mon, 19 May 2014 14:14:08 +0000 http://www.gigoblog.com/?p=602 So you want to clear the DNS cache on Mac OS X Mavericks through the now-current Mac OS 26? Well, Mac OS  since ‘Mavericks’ has some DNS changes under the hood. Unlike previous versions, to effectively clear the cache you need to execute these two commands in Terminal: dscacheutil -flushcache;sudo killall -HUP mDNSResponder Add this […]

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]]> https://gigoblog.com/2014/05/19/clear-dns-cache-on-os/feed/ 1 HD streaming on Roku fails https://gigoblog.com/2010/01/02/hd-streaming-on-roku-fails/ https://gigoblog.com/2010/01/02/hd-streaming-on-roku-fails/#comments Sat, 02 Jan 2010 20:51:46 +0000 http://www.gigoblog.com/?p=234 Recently my Roku, attached to a new Airport Extreme 802.11n Dual Band II router, started having problems streaming HD content from both Netflix and Amazon video. It also had intermittent quality problems with SD content as well. In the past, it performed flawlessly. Network tests (ranging from the obligatory Speed Test to ping and traceroute) […]

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]]> https://gigoblog.com/2010/01/02/hd-streaming-on-roku-fails/feed/ 2 Clear DNS cache on Mac OS X https://gigoblog.com/2008/11/10/clear-dns-cache-on-mac-os-x/ https://gigoblog.com/2008/11/10/clear-dns-cache-on-mac-os-x/#comments Mon, 10 Nov 2008 13:56:10 +0000 http://www.gigoblog.com/?p=165 Changing domains around on your web server can leave you with a local DNS cache that doesn’t match your domain’s new settings. Flush your DNS cache on Mac OS X 10.5 by issuing the following command: dscacheutil -flushcache Edit 5/19/2014: OS X Mavericks has a slightly different method for clearing the DNS cache.

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