域名缓存是指将域名解析的结果(如IP地址)暂时存储在本地或中间设备(如DNS服务器)中,以便在后续请求中快速响应,减少对权威DNS服务器的查询次数,提高网络访问速度。
/etc/hosts
文件或通过DNS客户端缓存。chrome://net-internals/#dns
,点击“Clear host cache”按钮。about:preferences#privacy
,滚动到“Cookies and Site Data”部分,点击“Clear Data”按钮,勾选“Cookies”和“Cached Web Content”。ipconfig /flushdns
,按回车。sudo killall -HUP mDNSResponder
,按回车。sudo systemd-resolve --flush-caches
,按回车。以下是一个简单的Python脚本,用于清除本地操作系统的DNS缓存:
import subprocess
def flush_dns_cache():
try:
if subprocess.call(['ipconfig', '/flushdns']) == 0:
print("DNS cache flushed successfully on Windows.")
elif subprocess.call(['sudo', 'killall', '-HUP', 'mDNSResponder']) == 0:
print("DNS cache flushed successfully on macOS.")
elif subprocess.call(['sudo', 'systemd-resolve', '--flush-caches']) == 0:
print("DNS cache flushed successfully on Linux.")
else:
print("Failed to flush DNS cache.")
except Exception as e:
print(f"An error occurred: {e}")
if __name__ == "__main__":
flush_dns_cache()
通过以上方法,你可以有效地清理域名缓存,确保域名解析的准确性和网络访问的速度。
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