77 lines
2.1 KiB
Bash
Executable File
77 lines
2.1 KiB
Bash
Executable File
#!/bin/bash
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# 用法:
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# ./dns-clean.sh # 清理 macOS / Linux 系统 DNS 缓存
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set -e
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SUDO=""
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[ "$(id -u)" -ne 0 ] && SUDO="sudo"
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flush_macos() {
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echo "macOS: 清理 DNS 缓存..."
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$SUDO dscacheutil -flushcache
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$SUDO killall -HUP mDNSResponder 2>/dev/null || true
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$SUDO killall mDNSResponderHelper 2>/dev/null || true
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echo "macOS DNS 缓存已清理"
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}
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flush_linux() {
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local flushed=0
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echo "Linux: 清理 DNS 缓存..."
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if command -v resolvectl &>/dev/null; then
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if $SUDO resolvectl flush-caches 2>/dev/null; then
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echo " - systemd-resolved (resolvectl) 缓存已清理"
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flushed=1
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fi
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elif command -v systemd-resolve &>/dev/null; then
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if $SUDO systemd-resolve --flush-caches 2>/dev/null; then
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echo " - systemd-resolved (systemd-resolve) 缓存已清理"
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flushed=1
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fi
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fi
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if command -v systemctl &>/dev/null; then
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if systemctl is-active --quiet nscd 2>/dev/null; then
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$SUDO systemctl restart nscd
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echo " - nscd 已重启"
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flushed=1
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fi
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if systemctl is-active --quiet dnsmasq 2>/dev/null; then
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$SUDO systemctl restart dnsmasq
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echo " - dnsmasq 已重启"
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flushed=1
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fi
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if systemctl is-active --quiet unbound 2>/dev/null; then
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if command -v rndc &>/dev/null; then
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$SUDO rndc flush 2>/dev/null && echo " - unbound 缓存已清理" && flushed=1
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else
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$SUDO systemctl restart unbound
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echo " - unbound 已重启"
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flushed=1
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fi
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fi
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fi
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if [ "$flushed" -eq 0 ]; then
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echo "未检测到常见 DNS 缓存服务 (systemd-resolved / nscd / dnsmasq / unbound)"
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echo "若仍有问题，可尝试重启 NetworkManager 或检查本地 DNS 配置"
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exit 1
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fi
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echo "Linux DNS 缓存已清理"
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}
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case "$(uname -s)" in
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Darwin) flush_macos ;;
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Linux) flush_linux ;;
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*)
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echo "错误: 不支持的操作系统: $(uname -s)"
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exit 1
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;;
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esac
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