How to Fix DNS Not Updating After Editing Your Hosts File

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Editing the hosts file does not always immediately redirect traffic, as several layers of caching and configuration can interfere with the change. Common culprits include commented-out lines, duplicate hostname entries, typos, or a stale OS DNS cache that needs to be flushed using system-specific commands. After flushing the OS cache, users should verify resolution via the terminal using ping or getent before assuming the browser is at fault. Browsers maintain their own DNS cache, so fully quitting and reopening the browser — or clearing the cache via browser settings — is a necessary step. Additional complications like VPNs, Docker containers, or HTTPS certificate mismatches can further obscure whether the hosts file change is actually working.

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ProgrammingDEV Community ·

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ProgrammingDEV Community ·

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