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什么是死链接？

死链接是指在网页中，链接到其他网页或文件的链接，但是该链接已经失效或无法正常访问，点击该链接无法打开目标网页或文件。也被称为“坏连接”、“失效链接”、“404错误”。

Public @ 2023-04-06 12:00:06

在Unix/Linux主机上设置301永久重定向的方法

在Unix/Linux主机上设置的方法可以用.htaccess文件1. Apache模块 mod_alias的 Redirect 和 RedirectMatch命令上面提到2个命令使用方法相似。而区别就是后者RedirectMatch基于正则表达式匹配对当前的URL发送一个外部重定向语法为：Redirect [status] URL-path URLRedirectMatch [status] r

Public @ 2016-01-08 16:09:39

robots 禁止快照

要防止所有搜索引擎显示您网站的快照，请将此元标记置入网页的 <HEAD> 部分：<meta name="robots" content="noarchive">要允许其他搜索引擎显示快照，但仅防止搜索引擎显示，请使用以下标记：<meta name="Baiduspider" content="noa

Public @ 2018-10-07 16:09:29

什么是死链接？

简单地讲，死链接指原来正常，后来失效的链接。死链接发送请求时，服务器返回404错误页面。在这些情况下出现死链接：动态链接在数据库不再支持的条件下，变成死链接。某个文件或网页移动了位置，导致指向它的链接变成死链接。网页内容更新并换成其他的链接，原来的链接变成死链接。网站服务器设置错误。从用户的角度来看，死链接和错误链接的表现是一样的，所以一般我们并不需要区别死链接和错误链接。作为SEO人员或网站管理

Public @ 2021-12-09 15:56:17

死链接是如何产生的?

威海seo技术提升威海死链
1299

1、网站内部添加了错误的内部链接编辑失误或者程序员大意让页面产生了不存在的页面。2、网站短暂无法访问因为服务器、空间或程序问题导致网站短暂无法访问，产生大量返回码为5开头的服务器错误页面。3、外部链接错误用户或者站长在站外发布了错误URL；别的网站复制或采集了你们含有错误链接的页面。4、爬虫提取了不完整的URL个别爬虫在提取页面URL的时候，因为URL中有不规则字符或者URL与后边的文字链接起来，

Public @ 2018-09-21 15:36:53

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基本文件流程错误 SQL 调试

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[ DB ] CONNECT:[ UseTime:0.025160s ] mysql:dbname=briline.net;host=106.14.77.182;port=3306;charset=utf8
[ SQL ] SHOW COLUMNS FROM `ob_article` [ RunTime:0.017780s ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 6867 LIMIT 1 [ RunTime:0.018116s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'const', 'possible_keys' => 'PRIMARY', 'key' => 'PRIMARY', 'key_len' => '4', 'ref' => 'const', 'rows' => 1, 'extra' => NULL, ) ]
[ SQL ] select * from `ob_article_tongji` where category_id=12 and mark_type='cate' order by times desc limit 15 [ RunTime:0.017196s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article_tongji', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 608, 'extra' => 'Using where; Using filesort', ) ]
[ SQL ] select * from `ob_article_tongji` where category_id=12 and mark_type='tags' order by times desc limit 100 [ RunTime:0.017336s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article_tongji', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 608, 'extra' => 'Using where; Using filesort', ) ]
[ SQL ] select * from `ob_article_tongji` where category_id=12 and mark_type='tags' order by rand() limit 30 [ RunTime:0.017449s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article_tongji', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 608, 'extra' => 'Using where; Using temporary; Using filesort', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 6867 LIMIT 1 [ RunTime:0.017085s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'const', 'possible_keys' => 'PRIMARY', 'key' => 'PRIMARY', 'key_len' => '4', 'ref' => 'const', 'rows' => 1, 'extra' => NULL, ) ]
[ SQL ] update `ob_article` set views=views+2 where id=6867 [ RunTime:0.017635s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `ob_article` WHERE `category_id` = 12 AND `cate` = '威海网站结构优化' AND `status` <> -1 LIMIT 1 [ RunTime:0.023949s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 8035, 'extra' => 'Using where', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `category_id` = 12 AND `cate` = '威海网站结构优化' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.037114s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 8035, 'extra' => 'Using where; Using temporary; Using filesort', ) ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `ob_article` WHERE `category_id` = 12 AND `tags` = '威海死链' AND `status` <> -1 LIMIT 1 [ RunTime:0.023751s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 8035, 'extra' => 'Using where', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `category_id` = 12 AND `tags` = '威海死链' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.036514s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 8035, 'extra' => 'Using where; Using temporary; Using filesort', ) ]

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