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Emptying the system's DNS cache
Your computer keeps the IP addresses of sites visited locally in order to find them again more quickly the next time without having to consult with the DNS servers. But if there have been any changes concerning your site (a server being moved, for example) and you notice something strange, it may be useful to empty the DNS cache before looking at it again.
Windows: clearing the DNS cache
- Open the Windows Start menu
- Type cmd
- In the search results, click on Command prompt
- Execute the command, ipconfig /flushdns
macOS: clearing the DNS cache
- Open Terminal
- Execute the command lookupd -flushcache (in the event of a failure: dscacheutil -flushcache)
Linux: clearing the DNS cache
- Open Terminal
- Execute the command /etc/rc.d/init.d/nscd restart to relaunch nscd
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