![]() Improve security ‒ avoid exposing sensitive information – such as login credentials and personal data – from DNS spoofing.Prevent search behavior tracking ‒ storing DNS records makes it easier for hackers to track your online searches.Therefore, here are some of the main benefits of flushing your DNS cache regularly: For example, your operating system may store a bad DNS cache when a site just moved to a new domain or host. However, corrupt or outdated DNS cache files can lead to errors and security vulnerabilities. As long as the cache files are still valid, operating systems will answer content requests without going through the DNS server. Its TTL determines the cache’s validity period. Most operating systems perform DNS caching to lessen the DNS servers’ burden during high traffic. Important! Use edge://net-internals/#dns if you’re using Microsoft Edge. It is also essential to flush your DNS cache in Google Chrome if it is your default web browser to avoid connection errors. Google Chrome stores a separate DNS cache from the operating system. systemd-resolve -statistics How to Flush DNS Cache in Google Chrome Then, enter the following command to check whether the previous command has successfully flushed the DNS cache. Use the following command line: systemd-resolve -flush-caches Here are the commands for Name Service Cache Daemon (nscd) and systemd.Įnter the following command line to clear DNS cache files on the init.d subdirectory: sudo /etc/init.d/nscd restart In the terminal window, enter the required command based on the service your Linux system is running. ![]() To clear your DNS cache using Linux, press Ctrl + Alt + T keys together to open the Terminal application. If you manually install a DNS service, you will need to flush the DNS cache on your computer. Unlike Windows and macOS, Ubuntu does not cache DNS records by default. MacOS 10.5 Leopard: sudo lookupd -flushcache How to Flush DNS Cache in Linux MacOS 10.6 Snow Leopard: sudo dscacheutil -flushcache MacOS 10.7 Lion, 10.8 Mountain Lion, or 10.9 Mavericks: sudo killall -HUP mDNSResponder MacOS 10.10 Yosemite: sudo discoveryutil udnsflushcaches MacOS 10.11 El Capitan, 10.12 Sierra, 10.13 High Sierra, 10.14 Mojave, or 10.15 Catalina: sudo killall -HUP mDNSResponder MacOS 11 Big Sur or 12 Monterey: sudo dscacheutil -flushcache sudo killall -HUP mDNSResponder Here are the specific commands for each version: If prompted, insert your admin password and click Enter key again to clear your DNS cache. Then, insert the command specific to your macOS version and press Enter. Next, open the command terminal window by pressing the F4 key and entering terminal in the Spotlight search field. Therefore, the first step is to check your macOS version by clicking on the Apple icon -> About This Mac. With macOS, make sure to run the correct flush DNS command based on your current OS version. How to Flush DNS Cache in macOS 11 Big Sur, 12 Monterey, and Older Versions Please note that you will need admin rights to do so. Important! Run the cmd command by pressing Ctrl + Shift + Enter to use the Run as administrator option more quickly. If the process is successful, you’ll see the following confirmation message in your Command Prompt console:
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