Clear the DNS cache

When a site moved to a new server but your machine still goes to the old one.

Tested on macOS 26 Tahoe · Oct 2026

Tested on Ubuntu 24.04 · Oct 2026

Tested on Windows 11 24H2 · Oct 2026

Clear the cacheNeeds sudo
Terminal
```
sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder
```
Nothing is printed when it works.

Clear the cacheNeeds sudo
Terminal · Ubuntu / Debian
```
sudo resolvectl flush-caches
```

Check it worked

Check the cache is empty
Terminal · Ubuntu / Debian
```
resolvectl statistics
```
The "Current Cache Size" line should be 0.

Clear the cache
PowerShell
```
ipconfig /flushdns
```

Check it worked

Check the cache is empty
PowerShell
```
ipconfig /displaydns
```

New to DNS? I explain it in plain English on Layman Terms.