{"id":127,"date":"2021-05-12T08:20:50","date_gmt":"2021-05-12T08:20:50","guid":{"rendered":"https:\/\/olion.cc\/?p=127"},"modified":"2026-05-11T15:20:03","modified_gmt":"2026-05-11T15:20:03","slug":"debug-commands","status":"publish","type":"post","link":"https:\/\/olion.cc\/?p=127","title":{"rendered":"Debug Commands"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Networking<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">tcpdump &#8211; debug  DHCP<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>tcpdump -i &lt;interface&gt; -vvv -s 0 port bootps<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">dnsmasq &#8211; run in front-end and show DHCP log<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>dnsmasq -u nobody --dhcp-authoritative -P 4096 -C \/var\/dnsmasq.conf -d --log-dhcp<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">dhclient &#8211; show detail<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>dhclient -v &lt;interface&gt;<\/code><\/pre>\n<div class=\"gsp_post_data\" \r\n\t            data-post_type=\"post\" \r\n\t            data-cat=\"backup\" \r\n\t            data-modified=\"120\"\r\n\t            data-created=\"1620807650\"\r\n\t            data-title=\"Debug Commands\" \r\n\t            data-home=\"https:\/\/olion.cc\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Networking tcpdump &#038;&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_eb_attr":"","footnotes":""},"categories":[22],"tags":[],"class_list":["post-127","post","type-post","status-publish","format-standard","hentry","category-backup"],"_links":{"self":[{"href":"https:\/\/olion.cc\/index.php?rest_route=\/wp\/v2\/posts\/127","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/olion.cc\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/olion.cc\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/olion.cc\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/olion.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=127"}],"version-history":[{"count":3,"href":"https:\/\/olion.cc\/index.php?rest_route=\/wp\/v2\/posts\/127\/revisions"}],"predecessor-version":[{"id":130,"href":"https:\/\/olion.cc\/index.php?rest_route=\/wp\/v2\/posts\/127\/revisions\/130"}],"wp:attachment":[{"href":"https:\/\/olion.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=127"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/olion.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=127"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/olion.cc\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=127"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}