{"id":5870,"date":"2026-06-28T23:34:34","date_gmt":"2026-06-28T14:34:34","guid":{"rendered":"https:\/\/eternalsphere.net\/echoes\/?p=5870"},"modified":"2026-06-28T23:34:34","modified_gmt":"2026-06-28T14:34:34","slug":"2epbvjlhwlipxm4","status":"publish","type":"post","link":"https:\/\/eternalsphere.net\/echoes\/index.php\/2026\/06\/28\/2epbvjlhwlipxm4\/","title":{"rendered":"\u4e00\u6b21\u4fbf\u643a\u5f0f Linux \u8bbe\u5907 Wi-Fi \u4e0e USB \u5171\u4eab\u7f51\u7edc\u51b2\u7a81\u7684\u6392\u67e5\u4e0e\u4fee\u590d"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">\u80cc\u666f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u67d0\u53f0\u4fbf\u643a\u5f0f Linux \u8bbe\u5907\u540c\u65f6\u5177\u5907\u4e24\u79cd\u8054\u7f51\u65b9\u5f0f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9ed8\u8ba4\u4f7f\u7528 USB \u5171\u4eab\u7f51\u7edc\u4f5c\u4e3a\u515c\u5e95\u8fde\u63a5\uff1b<\/li>\n\n\n\n<li>\u5230\u8fbe\u53ef\u7528 Wi-Fi \u73af\u5883\u540e\uff0c\u624b\u52a8\u6267\u884c\u4e00\u4e2a Wi-Fi \u8fde\u63a5\u811a\u672c\u63a5\u5165\u65e0\u7ebf\u7f51\u7edc\uff1b<\/li>\n\n\n\n<li>Wi-Fi \u8fde\u63a5\u6210\u529f\u540e\uff0c\u5e94\u81ea\u52a8\u6210\u4e3a\u6700\u9ad8\u4f18\u5148\u7ea7\u51fa\u53e3\uff1b<\/li>\n\n\n\n<li>Wi-Fi \u65ad\u5f00\u540e\uff0c\u5e94\u81ea\u52a8\u56de\u843d\u5230 USB \u5171\u4eab\u7f51\u7edc\uff1b<\/li>\n\n\n\n<li>\u4e0d\u5e0c\u671b\u5f15\u5165\u989d\u5916\u7684\u56fe\u5f62\u5316\u7f51\u7edc\u7ba1\u7406\u5668\uff1b<\/li>\n\n\n\n<li>\u4e0d\u5e0c\u671b\u591a\u5957 DHCP \u5ba2\u6237\u7aef\u540c\u65f6\u7ba1\u7406\u540c\u4e00\u4e2a\u63a5\u53e3\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u7cfb\u7edf\u4e2d\u539f\u672c\u6709\u51e0\u7c7b\u81ea\u5b9a\u4e49\u8f85\u52a9\u811a\u672c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;Wi-Fi\u8fde\u63a5\u811a\u672c&gt;\n&lt;Wi-Fi\u65ad\u5f00\u811a\u672c&gt;\n&lt;Wi-Fi\u72b6\u6001\u811a\u672c&gt;\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5176\u4e2d\uff0c\u8fde\u63a5\u811a\u672c\u7528\u4e8e\u626b\u63cf\u5e76\u8fde\u63a5 Wi-Fi\uff0c\u65ad\u5f00\u811a\u672c\u7528\u4e8e\u624b\u52a8\u65ad\u5f00 Wi-Fi\u3002\u7cfb\u7edf\u672c\u8eab\u5219\u542f\u7528\u4e86 <code>dhcpcd<\/code>\uff0c\u7528\u4e8e\u7edf\u4e00\u7ba1\u7406 DHCP\u3001IP \u5730\u5740\u3001DNS\u3001\u9ed8\u8ba4\u8def\u7531\u548c metric \u4f18\u5148\u7ea7\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u6700\u521d\u53d1\u73b0\u7684\u95ee\u9898<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e00\u6b21\u7cfb\u7edf\u81ea\u68c0\u4e2d\u53d1\u73b0\uff0c\u8bbe\u5907\u4e0a\u540c\u65f6\u5b58\u5728 <code>dhcpcd<\/code> \u548c <code>dhclient<\/code>\uff0c\u5e76\u4e14\u4e8c\u8005\u90fd\u5728\u5904\u7406\u540c\u4e00\u4e2a\u65e0\u7ebf\u63a5\u53e3\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u7c7b\u60c5\u51b5\u5bb9\u6613\u9020\u6210\u7f51\u7edc\u6808\u6df7\u4e71\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>dhcpcd \u7ba1\u7406 &lt;\u65e0\u7ebf\u63a5\u53e3&gt;\ndhclient \u4e5f\u7ed1\u5b9a &lt;\u65e0\u7ebf\u63a5\u53e3&gt;\n\u4e8c\u8005\u90fd\u53ef\u80fd\u4fee\u6539 IP\u3001DNS \u548c\u9ed8\u8ba4\u8def\u7531\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u540c\u65f6\u8fd8\u89c2\u5bdf\u5230\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>USB \u5171\u4eab\u7f51\u7edc\u63a5\u53e3\u6b63\u5e38\u83b7\u5f97\u5730\u5740\uff1b<\/li>\n\n\n\n<li>Wi-Fi \u63a5\u53e3\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u4e5f\u80fd\u83b7\u5f97\u5730\u5740\uff1b<\/li>\n\n\n\n<li>\u9ed8\u8ba4\u8def\u7531\u6709\u65f6\u7531 Wi-Fi \u63a5\u7ba1\uff0c\u6709\u65f6\u56de\u843d\u5230 USB\uff1b<\/li>\n\n\n\n<li>\u65e5\u5fd7\u4e2d\u51fa\u73b0 DHCP\u3001\u8def\u7531\u66f4\u65b0\u76f8\u5173\u7684\u91cd\u590d\u884c\u4e3a\uff1b<\/li>\n\n\n\n<li>\u81ea\u52a8\u5316\u68c0\u67e5\u5de5\u5177\u66fe\u7ecf\u7ed9\u51fa\u8fc7\u4e0d\u5b8c\u5168\u53ef\u9760\u7684\u7ed3\u8bba\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u91cc\u7684\u4e00\u4e2a\u91cd\u8981\u6559\u8bad\u662f\uff1a\u81ea\u52a8\u5316\u4ee3\u7406\u53ef\u4ee5\u5e2e\u52a9\u6536\u96c6\u4fe1\u606f\uff0c\u4f46\u5b89\u5168\u548c\u7f51\u7edc\u76f8\u5173\u7ed3\u8bba\u5fc5\u987b\u56de\u5230\u539f\u59cb\u547d\u4ee4\u8f93\u51fa\u6838\u5bf9\u3002\u5c24\u5176\u5728\u9ad8\u6743\u9650\u73af\u5883\u4e0b\uff0c\u4e0d\u80fd\u8ba9\u4ee3\u7406\u5728\u672a\u7ecf\u786e\u8ba4\u7684\u60c5\u51b5\u4e0b\u76f4\u63a5\u6267\u884c\u4fee\u590d\u3001\u91cd\u542f\u670d\u52a1\u6216\u4fee\u6539\u7f51\u7edc\u72b6\u6001\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u9700\u6c42\u6f84\u6e05<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u53f0\u8bbe\u5907\u4e0d\u662f\u56fa\u5b9a\u670d\u52a1\u5668\uff0c\u800c\u662f\u4fbf\u643a\u5f0f\u8bbe\u5907\uff0c\u56e0\u6b64\u7f51\u7edc\u7b56\u7565\u4e0e\u666e\u901a\u670d\u52a1\u5668\u4e0d\u540c\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9e\u9645\u9700\u6c42\u53ef\u4ee5\u6982\u62ec\u4e3a\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u9ed8\u8ba4 USB \u5171\u4eab\u7f51\u7edc\u5728\u7ebf\uff1b\n\u624b\u52a8\u8fde\u63a5 Wi-Fi\uff1b\nWi-Fi \u8fde\u4e0a\u540e\u4f18\u5148\u7ea7\u6700\u9ad8\uff1b\nWi-Fi \u65ad\u5f00\u540e\u81ea\u52a8\u56de\u9000 USB\uff1b\n\u53ea\u4fdd\u7559\u4e00\u5957 DHCP \/ \u8def\u7531 \/ DNS \u7ba1\u7406\u903b\u8f91\u3002\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u56e0\u6b64\uff0c\u4e0d\u9002\u5408\u8ba9 Wi-Fi \u8fde\u63a5\u811a\u672c\u540c\u65f6\u8d1f\u8d23 Wi-Fi \u8ba4\u8bc1\u3001DHCP \u8bf7\u6c42\u3001DNS \u66f4\u65b0\u548c\u9ed8\u8ba4\u8def\u7531\u4fee\u6539\u3002\u66f4\u5408\u7406\u7684\u5206\u5de5\u662f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>dhcpcd\uff1a\n  \u7edf\u4e00\u7ba1\u7406 DHCP\u3001IP\u3001DNS\u3001\u8def\u7531\u3001metric\u3002\n\n&lt;Wi-Fi\u8fde\u63a5\u811a\u672c&gt;\uff1a\n  \u53ea\u8d1f\u8d23 Wi-Fi \u626b\u63cf\u3001\u9009\u62e9 SSID\u3001\u751f\u6210 wpa_supplicant \u914d\u7f6e\u3001\u542f\u52a8 Wi-Fi \u8ba4\u8bc1\u3002\n\n&lt;Wi-Fi\u65ad\u5f00\u811a\u672c&gt;\uff1a\n  \u53ea\u8d1f\u8d23\u65ad\u5f00 Wi-Fi \u8ba4\u8bc1\u8fdb\u7a0b\uff0c\u5fc5\u8981\u65f6\u5173\u95ed\u65e0\u7ebf\u63a5\u53e3\u3002\n\ndhclient\uff1a\n  \u4e0d\u518d\u53c2\u4e0e\u3002\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u53ea\u8bfb\u6392\u67e5<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6b63\u5f0f\u4fee\u6539\u524d\uff0c\u5148\u8fdb\u884c\u53ea\u8bfb\u68c0\u67e5\uff0c\u91cd\u70b9\u786e\u8ba4\u5f53\u524d\u5230\u5e95\u6709\u54ea\u4e9b\u7f51\u7edc\u7ec4\u4ef6\u5728\u8fd0\u884c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ps aux | grep -E 'dhcpcd|dhclient|wpa_supplicant' | grep -v grep\nip -br addr\nip route\nresolvectl status\nsystemctl status dhcpcd --no-pager\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u540c\u65f6\u68c0\u67e5\u81ea\u5b9a\u4e49\u811a\u672c\u5185\u5bb9\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>type -a &lt;Wi-Fi\u8fde\u63a5\u811a\u672c&gt;\ntype -a &lt;Wi-Fi\u65ad\u5f00\u811a\u672c&gt;\ntype -a &lt;Wi-Fi\u72b6\u6001\u811a\u672c&gt;\n\nbash -n &lt;Wi-Fi\u8fde\u63a5\u811a\u672c\u8def\u5f84&gt;\nbash -n &lt;Wi-Fi\u65ad\u5f00\u811a\u672c\u8def\u5f84&gt;\n\ngrep -nE 'dhclient|dhcpcd|wpa_supplicant|ip route|ip addr|systemctl' \\\n  &lt;Wi-Fi\u8fde\u63a5\u811a\u672c\u8def\u5f84&gt; &lt;Wi-Fi\u65ad\u5f00\u811a\u672c\u8def\u5f84&gt;\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u68c0\u67e5\u7ed3\u679c\u8868\u660e\uff0c<code>dhcpcd<\/code> \u5df2\u7ecf\u5728\u7cfb\u7edf\u4e2d\u542f\u7528\u5e76\u8fd0\u884c\uff0c\u800c\u65e7\u7248 Wi-Fi \u8fde\u63a5\u811a\u672c\u4e2d\u4ecd\u7136\u5305\u542b\u7c7b\u4f3c\u903b\u8f91\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>dhclient -r \"$IFACE\"\ndhclient \"$IFACE\"\nip route del default ...\nip route add default ...\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u610f\u5473\u7740\u811a\u672c\u5728\u542f\u52a8 Wi-Fi \u8ba4\u8bc1\u540e\uff0c\u53c8\u624b\u52a8\u91ca\u653e DHCP\u3001\u91cd\u65b0\u8bf7\u6c42 DHCP\uff0c\u5e76\u4fee\u6539\u9ed8\u8ba4\u8def\u7531\u3002\u8fd9\u6837\u4f1a\u4e0e <code>dhcpcd<\/code> \u7684\u804c\u8d23\u91cd\u53e0\uff0c\u5f62\u6210\u201c\u53cc\u7f51\u7edc\u7ba1\u7406\u5668\u201d\u51b2\u7a81\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u6839\u56e0<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6839\u56e0\u4e0d\u662f Wi-Fi \u672c\u8eab\uff0c\u4e5f\u4e0d\u662f USB \u5171\u4eab\u7f51\u7edc\u672c\u8eab\uff0c\u800c\u662f\u804c\u8d23\u8fb9\u754c\u6df7\u4e71\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u7cfb\u7edf\u5c42\u9762\uff1a\n  dhcpcd \u5df2\u7ecf\u8d1f\u8d23\u7f51\u7edc\u7ba1\u7406\u3002\n\n\u811a\u672c\u5c42\u9762\uff1a\n  &lt;Wi-Fi\u8fde\u63a5\u811a\u672c&gt; \u53c8\u624b\u52a8\u8c03\u7528 dhclient \u5e76\u4fee\u6539\u9ed8\u8ba4\u8def\u7531\u3002\n\n\u7ed3\u679c\uff1a\n  \u540c\u4e00\u4e2a\u65e0\u7ebf\u63a5\u53e3\u88ab dhcpcd \u548c dhclient \u91cd\u590d\u7ba1\u7406\u3002\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u65e7\u811a\u672c\u867d\u7136\u5728\u67d0\u4e9b\u65f6\u5019\u201c\u770b\u8d77\u6765\u80fd\u8fde\u4e0a\u7f51\u201d\uff0c\u4f46\u5b83\u662f\u901a\u8fc7\u624b\u52a8 DHCP \u548c\u624b\u52a8\u8def\u7531\u5f3a\u884c\u63a5\u7ba1\u7f51\u7edc\u3002\u957f\u671f\u6765\u770b\uff0c\u8fd9\u79cd\u505a\u6cd5\u4f1a\u589e\u52a0\u4e0d\u7a33\u5b9a\u6027\uff0c\u4e5f\u4f1a\u8ba9\u540e\u7eed\u6392\u969c\u56f0\u96be\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4fee\u590d\u539f\u5219<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4fee\u590d\u65f6\u9075\u5faa\u51e0\u4e2a\u539f\u5219\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u53ea\u4fdd\u7559 <code>dhcpcd<\/code> \u4f5c\u4e3a DHCP \/ DNS \/ \u8def\u7531 \/ metric \u7ba1\u7406\u5668\uff1b<\/li>\n\n\n\n<li>\u4e0d\u5f15\u5165\u989d\u5916\u7f51\u7edc\u7ba1\u7406\u5668\uff1b<\/li>\n\n\n\n<li>\u4e0d\u4fee\u6539\u5f53\u524d\u6b63\u5728\u8fd0\u884c\u7684\u7f51\u7edc\u72b6\u6001\uff1b<\/li>\n\n\n\n<li>\u4fee\u6539\u524d\u5fc5\u987b\u5907\u4efd\uff1b<\/li>\n\n\n\n<li>\u5148\u53ea\u6539\u81ea\u5b9a\u4e49\u811a\u672c\uff0c\u4e0d\u52a8\u7cfb\u7edf\u7f51\u7edc\u914d\u7f6e\uff1b<\/li>\n\n\n\n<li>\u4e0d\u5728\u4fee\u6539\u8fc7\u7a0b\u4e2d\u6267\u884c\u8fde\u63a5\u811a\u672c\u3001\u65ad\u5f00\u811a\u672c\u3001<code>dhclient<\/code> \u6216\u7f51\u7edc\u91cd\u542f\uff1b<\/li>\n\n\n\n<li>\u4fee\u6539\u5b8c\u6210\u540e\u7531\u4eba\u5de5\u624b\u52a8\u91cd\u542f\u6216\u624b\u52a8\u9a8c\u8bc1\u3002<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u5907\u4efd\u4f7f\u7528 <code>cp -a<\/code>\uff0c\u4ee5\u4fdd\u7559\u539f\u6743\u9650\u3001\u5c5e\u4e3b\u548c\u65f6\u95f4\u6233\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ts=$(date +%Y%m%d-%H%M%S)\ncp -a &lt;Wi-Fi\u8fde\u63a5\u811a\u672c\u8def\u5f84&gt; &lt;Wi-Fi\u8fde\u63a5\u811a\u672c\u8def\u5f84&gt;.before-dhcpcd-only-\"$ts\"\ncp -a &lt;Wi-Fi\u65ad\u5f00\u811a\u672c\u8def\u5f84&gt; &lt;Wi-Fi\u65ad\u5f00\u811a\u672c\u8def\u5f84&gt;.before-dhcpcd-only-\"$ts\"\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b2c\u4e00\u8f6e\u4fee\u6539\uff1a\u79fb\u9664 dhclient \u548c\u624b\u52a8\u8def\u7531<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Wi-Fi \u8fde\u63a5\u811a\u672c\u4e2d\u5220\u9664\u4ee5\u4e0b\u903b\u8f91\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>dhclient -r \"$IFACE\"\ndhclient \"$IFACE\"\nip route del default ...\nip route add default ...\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Wi-Fi \u65ad\u5f00\u811a\u672c\u4e2d\u5220\u9664\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>dhclient -r \"$IFACE\"\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u540c\u65f6\u5c06\u539f\u672c\u8fc7\u5bbd\u7684\u8fdb\u7a0b\u6e05\u7406\u903b\u8f91\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>pkill wpa_supplicant\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u6536\u7a84\u4e3a\u53ea\u5339\u914d\u76ee\u6807\u65e0\u7ebf\u63a5\u53e3\uff0c\u907f\u514d\u8bef\u6740\u5176\u4ed6 <code>wpa_supplicant<\/code> \u8fdb\u7a0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>pkill -f \"wpa_supplicant .* -i ${IFACE}( |$)\" 2&gt;\/dev\/null || true\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4fee\u6539\u540e\u6267\u884c\u9759\u6001\u68c0\u67e5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>bash -n &lt;Wi-Fi\u8fde\u63a5\u811a\u672c\u8def\u5f84&gt;\nbash -n &lt;Wi-Fi\u65ad\u5f00\u811a\u672c\u8def\u5f84&gt;\n\ngrep -nE 'dhclient|ip route add|ip route del' \\\n  &lt;Wi-Fi\u8fde\u63a5\u811a\u672c\u8def\u5f84&gt; &lt;Wi-Fi\u65ad\u5f00\u811a\u672c\u8def\u5f84&gt; || true\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u671f\u671b\u7ed3\u679c\u662f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>bash -n \u901a\u8fc7\uff1b\ngrep \u65e0\u8f93\u51fa\uff1b\n\u811a\u672c\u4e2d\u4e0d\u518d\u6b8b\u7559 dhclient \u548c\u624b\u52a8\u9ed8\u8ba4\u8def\u7531\u64cd\u4f5c\u3002\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b2c\u4e00\u8f6e\u9a8c\u8bc1\u7ed3\u679c<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u91cd\u542f\u540e\uff0c\u9ed8\u8ba4\u72b6\u6001\u4e0b\u53ea\u5269 <code>dhcpcd<\/code> \u7ba1\u7406\u7f51\u7edc\uff0c<code>dhclient<\/code> \u4e0d\u518d\u51fa\u73b0\u3002USB \u5171\u4eab\u7f51\u7edc\u6b63\u5e38\u83b7\u5f97\u5730\u5740\uff0c\u9ed8\u8ba4\u8def\u7531\u8d70 USB \u5171\u4eab\u7f51\u7edc\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6b64\u65f6\u72b6\u6001\u7b26\u5408\u201c\u9ed8\u8ba4 USB \u515c\u5e95\u201d\u7684\u9700\u6c42\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f46\u9996\u6b21\u6267\u884c\u65b0\u7248 Wi-Fi \u8fde\u63a5\u811a\u672c\u540e\u53d1\u73b0\uff0c\u811a\u672c\u542f\u52a8\u4e86 <code>wpa_supplicant<\/code>\uff0c\u5374\u8fc7\u65e9\u8f93\u51fa\u7ed3\u679c\u3002Wi-Fi \u5c1a\u672a\u5b8c\u6210\u5173\u8054\uff0cIPv4 \u5730\u5740\u548c\u9ed8\u8ba4\u8def\u7531\u4e5f\u5c1a\u672a\u51fa\u73b0\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u8bf4\u660e\u7b2c\u4e00\u8f6e\u4fee\u590d\u5df2\u7ecf\u89e3\u51b3\u4e86 <code>dhclient<\/code> \u51b2\u7a81\uff0c\u4f46\u811a\u672c\u8fd8\u7f3a\u5c11\u201c\u7b49\u5f85 Wi-Fi \u5173\u8054\u548c\u7b49\u5f85 DHCP \u5b8c\u6210\u201d\u7684\u903b\u8f91\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b2c\u4e8c\u8f6e\u4fee\u6539\uff1a\u589e\u52a0\u7b49\u5f85\u548c\u8bca\u65ad<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b2c\u4e8c\u8f6e\u53ea\u4fee\u6539 Wi-Fi \u8fde\u63a5\u811a\u672c\uff0c\u4e0d\u4fee\u6539 Wi-Fi \u65ad\u5f00\u811a\u672c\u548c\u7cfb\u7edf\u7f51\u7edc\u914d\u7f6e\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u65b0\u589e\u903b\u8f91\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u542f\u52a8 <code>wpa_supplicant<\/code> \u540e\u6700\u591a\u7b49\u5f85 30 \u79d2\uff1b<\/li>\n\n\n\n<li>\u4f18\u5148\u4f7f\u7528 <code>wpa_cli<\/code> \u68c0\u67e5 <code>wpa_state=COMPLETED<\/code>\uff1b<\/li>\n\n\n\n<li>\u5982\u679c <code>wpa_cli<\/code> \u4e0d\u53ef\u7528\uff0c\u5219\u4f7f\u7528 <code>iw<\/code> \u68c0\u67e5\u65e0\u7ebf\u8fde\u63a5\u72b6\u6001\uff1b<\/li>\n\n\n\n<li>Wi-Fi \u5173\u8054\u6210\u529f\u540e\uff0c\u7ee7\u7eed\u7b49\u5f85 <code>dhcpcd<\/code> \u7ed9\u65e0\u7ebf\u63a5\u53e3\u5206\u914d IPv4\uff1b<\/li>\n\n\n\n<li>\u7b49\u5f85\u7ed3\u675f\u540e\u8f93\u51fa\u5b8c\u6574\u8bca\u65ad\u4fe1\u606f\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u8bca\u65ad\u8f93\u51fa\u5305\u62ec\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>wpa_cli -i &lt;\u65e0\u7ebf\u63a5\u53e3&gt; status\niw dev &lt;\u65e0\u7ebf\u63a5\u53e3&gt; link\nip -br addr\nip route\nresolvectl status\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u540c\u65f6\u4ecd\u7136\u4fdd\u6301\u7981\u6b62\u9879\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u4e0d\u8c03\u7528 dhclient\uff1b\n\u4e0d\u6267\u884c ip route add\uff1b\n\u4e0d\u6267\u884c ip route del\uff1b\n\u4e0d\u624b\u52a8\u4fee\u6539\u9ed8\u8ba4\u8def\u7531\u3002\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4fee\u6539\u540e\u518d\u6b21\u6267\u884c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>bash -n &lt;Wi-Fi\u8fde\u63a5\u811a\u672c\u8def\u5f84&gt;\ngrep -nE 'dhclient|ip route add|ip route del' &lt;Wi-Fi\u8fde\u63a5\u811a\u672c\u8def\u5f84&gt; || true\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u786e\u8ba4\u6ca1\u6709\u5371\u9669\u903b\u8f91\u6b8b\u7559\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u6700\u7ec8\u9a8c\u8bc1<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u624b\u52a8\u6267\u884c Wi-Fi \u8fde\u63a5\u811a\u672c\u540e\uff0cWi-Fi \u6210\u529f\u5173\u8054\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>wpa_state=COMPLETED\nssid=&lt;\u5df2\u8131\u654f&gt;\nip_address=&lt;Wi-Fi\u7f51\u6bb5\u5730\u5740&gt;\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u65e0\u7ebf\u63a5\u53e3\u83b7\u5f97 IPv4 \u5730\u5740\uff0c\u8def\u7531\u8868\u4e2d\u51fa\u73b0\u4e24\u6761\u9ed8\u8ba4\u8def\u7531\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>default via &lt;Wi-Fi\u7f51\u5173&gt; dev &lt;\u65e0\u7ebf\u63a5\u53e3&gt; metric &lt;\u8f83\u4f4e\u503c&gt;\ndefault via &lt;USB\u5171\u4eab\u7f51\u5173&gt; dev &lt;USB\u5171\u4eab\u63a5\u53e3&gt; metric &lt;\u8f83\u9ad8\u503c&gt;\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u8bf4\u660e\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Wi-Fi \u9ed8\u8ba4\u8def\u7531\u4f18\u5148\uff1b\nUSB \u5171\u4eab\u7f51\u7edc\u4ecd\u7136\u4fdd\u7559\u4e3a\u5907\u7528\uff1b\ndhcpcd \u6b63\u5e38\u8d1f\u8d23 IP \/ DNS \/ \u8def\u7531 \/ metric\uff1b\ndhclient \u6ca1\u6709\u91cd\u65b0\u51fa\u73b0\u3002\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u968f\u540e\u6267\u884c Wi-Fi \u65ad\u5f00\u811a\u672c\uff0cWi-Fi \u8ba4\u8bc1\u8fdb\u7a0b\u88ab\u6e05\u7406\uff0c\u65e0\u7ebf\u63a5\u53e3\u5173\u95ed\uff0c\u9ed8\u8ba4\u8def\u7531\u56de\u843d\u5230 USB \u5171\u4eab\u7f51\u7edc\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>default via &lt;USB\u5171\u4eab\u7f51\u5173&gt; dev &lt;USB\u5171\u4eab\u63a5\u53e3&gt; metric &lt;\u8f83\u9ad8\u503c&gt;\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">DNS \u4e5f\u56de\u5230 USB \u5171\u4eab\u7f51\u7edc\u5bf9\u5e94\u7684\u7f51\u5173\u3002\u518d\u6b21\u68c0\u67e5\u8fdb\u7a0b\uff0c\u4ecd\u7136\u6ca1\u6709 <code>dhclient<\/code>\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u540e\u901a\u8fc7\u8fde\u901a\u6027\u9a8c\u8bc1\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ip route get &lt;\u5916\u7f51\u6d4b\u8bd5\u5730\u5740&gt;\nping -c 3 &lt;USB\u5171\u4eab\u7f51\u5173&gt;\nping -c 3 &lt;\u5916\u7f51\u6d4b\u8bd5\u5730\u5740&gt;\nping -c 3 &lt;\u57df\u540d\u6d4b\u8bd5\u5730\u5740&gt;\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u7ed3\u679c\u663e\u793a\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5916\u7f51\u8def\u7531\u6b63\u5e38\uff1b<\/li>\n\n\n\n<li>USB \u5171\u4eab\u7f51\u7edc\u7f51\u5173\u53ef\u8fbe\uff1b<\/li>\n\n\n\n<li>\u5916\u7f51 IP \u53ef\u8fbe\uff1b<\/li>\n\n\n\n<li>DNS \u89e3\u6790\u6b63\u5e38\uff1b<\/li>\n\n\n\n<li>\u4e22\u5305\u7387\u4e3a 0%\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u81f3\u6b64\uff0c\u4fbf\u643a\u5f0f\u7f51\u7edc\u5207\u6362\u903b\u8f91\u95ed\u73af\u5b8c\u6210\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u6700\u7ec8\u67b6\u6784<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4fee\u590d\u540e\u7684\u804c\u8d23\u5212\u5206\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>dhcpcd\n  \u251c\u2500 \u8d1f\u8d23 DHCP\n  \u251c\u2500 \u8d1f\u8d23 IPv4 \u5730\u5740\n  \u251c\u2500 \u8d1f\u8d23 DNS\n  \u251c\u2500 \u8d1f\u8d23\u9ed8\u8ba4\u8def\u7531\n  \u2514\u2500 \u8d1f\u8d23 metric \u4f18\u5148\u7ea7\n\n&lt;Wi-Fi\u8fde\u63a5\u811a\u672c&gt;\n  \u251c\u2500 \u6253\u5f00\u65e0\u7ebf\u63a5\u53e3\n  \u251c\u2500 \u626b\u63cf Wi-Fi\n  \u251c\u2500 \u9009\u62e9 SSID\n  \u251c\u2500 \u751f\u6210 wpa_supplicant \u914d\u7f6e\n  \u251c\u2500 \u542f\u52a8 wpa_supplicant\n  \u251c\u2500 \u7b49\u5f85 Wi-Fi \u5173\u8054\n  \u2514\u2500 \u7b49\u5f85 dhcpcd \u5206\u914d IPv4\n\n&lt;Wi-Fi\u65ad\u5f00\u811a\u672c&gt;\n  \u251c\u2500 \u505c\u6b62\u76ee\u6807\u65e0\u7ebf\u63a5\u53e3\u5bf9\u5e94\u7684 wpa_supplicant\n  \u2514\u2500 \u5173\u95ed\u65e0\u7ebf\u63a5\u53e3\n\nUSB \u5171\u4eab\u7f51\u7edc\n  \u2514\u2500 \u9ed8\u8ba4\u515c\u5e95\u7f51\u7edc\n\nWi-Fi\n  \u2514\u2500 \u8fde\u63a5\u540e\u6210\u4e3a\u6700\u9ad8\u4f18\u5148\u7ea7\u51fa\u53e3\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u7ecf\u9a8c\u603b\u7ed3<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u6b21\u6392\u67e5\u7684\u5173\u952e\u4e0d\u662f\u7b80\u5355\u5220\u9664\u67d0\u4e2a\u670d\u52a1\uff0c\u800c\u662f\u91cd\u65b0\u5212\u6e05\u804c\u8d23\u8fb9\u754c\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4fbf\u643a\u5f0f\u8bbe\u5907\u7684\u7f51\u7edc\u9700\u6c42\u901a\u5e38\u4e0d\u540c\u4e8e\u56fa\u5b9a\u670d\u52a1\u5668\uff1aUSB \u5171\u4eab\u7f51\u7edc\u53ef\u4ee5\u4f5c\u4e3a\u7a33\u5b9a\u515c\u5e95\uff0cWi-Fi \u5219\u4f5c\u4e3a\u624b\u52a8\u63a5\u5165\u540e\u7684\u9ad8\u4f18\u5148\u7ea7\u51fa\u53e3\u3002\u53ea\u8981 metric \u914d\u7f6e\u6b63\u786e\uff0c\u5c31\u4e0d\u9700\u8981\u811a\u672c\u624b\u52a8\u4fee\u6539\u9ed8\u8ba4\u8def\u7531\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u66f4\u91cd\u8981\u7684\u662f\uff0cDHCP \u5ba2\u6237\u7aef\u53ea\u80fd\u4fdd\u7559\u4e00\u5957\u3002<code>dhcpcd<\/code> \u548c <code>dhclient<\/code> 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