This allows your computer to navigate to sites you've already visited, without asking the DNS server every time.
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Unfortunately, on rare occasions, this cache can cause problems. Maybe the site you're visiting changed servers, and is no longer located at the cached address, or you have some malware that's trying to redirect common pages to malicious sites. If you suspect the problem might be malware , you might want to run a scan with one of these tools.
Whatever the case, you can "flush" your DNS cache to start from scratch, so your computer looks up web addresses on the DNS server again.
How to Reset DNS Cache in macOS High Sierra
This process is, of course, different from clearing your web cache from a web browser. If clearing your browser's cache has not solved the problem, clearing your DNS cache may be the next step. Here's how to do it on Windows and macOS using the command line. If you're using Linux, you'll need to look up instructions for your particular distribution.
How to clear the DNS cache on your iPhone, iPad & Mac
Click the Start menu and type "cmd. If not, the site may be down, you could be having Wi-Fi problems , or you may have a more elusive network problem on your end that needs to be tracked down. If this is someone else's computer, you can always try troubleshooting remotely.
March 9, at Kellen says: Rich says: August 23, at 9: Nelis says: March 9, at 5: March 9, at 6: Jan Steinman says: Willdon says: March 10, at Nate says: March 13, at 4: Kent Ketell says: Linux distributions are a bit different from Windows and Mac machines. They use specific DNS services. It depends which service you have in your distribution and if the system enabled it by default.
How to Flush Your DNS Cache
For every distribution, you need to launch Terminal. Enter your password if necessary.
The process stops and then starts the NCSD service within seconds. Again, enter your password if the terminal asks you.
You will see the response when the service stops and starts again. You may need to enter your password to finish the process. Just append flushname and the domain name to the sudo rndc command. For example: The Internet we use today would not be the same without the immense work Domain Name Systems are doing.