Problem
You want to update your dns resolution locally after some change in DNS.
You want to do this because your local dns cache still holds the old information about the domain. For example using your local dns and the google one returns two different results
BASH
x
host changed_domain.comreturns the old iphost changed_domain.com 8.8.8.8returns the new ip.Solution
Check your systemd-resolved is active:
BASH
sudo systemctl is-active systemd-resolvedactiveGet some statistics:
BASH
sudo systemd-resolve --statisticsTransactionsCurrent Transactions: 0 Total Transactions: 38818Cache Current Cache Size: 73 Cache Hits: 21120 Cache Misses: 19745DNSSEC Verdicts Secure: 0 Insecure: 0 Bogus: 0 Indeterminate: 0Flush the cache (make the Current Cache Size above 0)
BASH
sudo systemd-resolve --flush-cachesCheck the cache again (should be 0 now):
BASH
sudo systemd-resolve --statisticsransactionsCurrent Transactions: 0 Total Transactions: 38818Cache Current Cache Size: 0 Cache Hits: 21120 Cache Misses: 19745DNSSEC Verdicts Secure: 0 Insecure: 0 Bogus: 0 Indeterminate: 0Information taken from https://www.techrepublic.com/article/how-to-flush-the-dns-cache-on-linux/