不想为了这小小的功能而多添加一个插件，所以在主题目录下的 functions.php 文件添加了以下代码：

function delete_post_revisions() {
  global $wpdb;
 
  // Also need to delete the post meta and term relationships
  $wpdb->query("DELETE FROM {$wpdb->postmeta} WHERE post_id IN (SELECT ID FROM {$wpdb->posts} WHERE post_type = 'revision')");
  $wpdb->query("DELETE FROM {$wpdb->term_relationships} WHERE object_id IN (SELECT ID FROM {$wpdb->posts} WHERE post_type = 'revision')");
 
  // Delete the post revisions
  $wpdb->query("DELETE FROM {$wpdb->posts} WHERE post_type = 'revision'");
}
 
// Register the event
add_action('delete_post_revisions_event', 'delete_post_revisions');
if (!wp_next_scheduled('delete_post_revisions_event')) {
  wp_schedule_event(time(), 'daily', 'delete_post_revisions_event');
}

这样 Wordpress 每天会自动删除 post revision (当然得在有人访问的前提下)。其实每天运行一次也有些过于频繁了，可以将时间间隔设置得更长一些，譬如一周或者二周甚至一个月。不过 Wordpress 的 Cron API 本身只提供了 hourly, daily 两个选项，所以需要自己手工添加一些运行时间间隔选项。在刚才添加的代码之前添加以下代码，

function add_schedule_options($schedules) {
  $custom_schedules = array(
    'weekly' => array( 'interval' => 604800, 'display' => __('Once Weekly') ), 
    'fortnightly' => array( 'interval' => 1209600, 'display' => __('Once Fortnightly') ), 
    'monthly' => array( 'interval' => 2592000, 'display' => __('Once Monthly') ), 
  );
 
  return array_merge($custom_schedules, $schedules);
}
add_filter('cron_schedules', 'add_schedule_options');

然后把 wp_schedule_event 函数的第二个参数值 daily 改成 weekly 或 fortnightly 或 monthly 即可。

可 Google XML Sitemaps 只能忽略指定的日志或页面，而不能忽略整个分类，所以只能自己动手了。

1. 打开插件目录下的 sitemap-core.php 文件，找到：

$where.=" AND post_password='' ORDER BY post_modified DESC";
 
$sql .= $where;

修改成：

$where.=" AND post_password='' ORDER BY post_modified DESC";
$where = apply_filters('sitemap_exclude_categories', $where);
$sql .= $where;

2. 打开主题目录下的 functions.php 文件，添加一下代码：

function sitemap_exclude_categories($where) {
  global $wpdb;
  $cates = array(11); // 在这里指定要忽略的类别id，多个类别id用半角逗号分隔
  if (count($cates) > 0) {
    $table_posts = $wpdb->posts;
    $exclude = "(NOT EXISTS (
      SELECT r.object_id FROM {$wpdb->term_relationships} r 
      INNER JOIN {$wpdb->term_taxonomy} t ON r.term_taxonomy_id = t.term_taxonomy_id 
      WHERE t.taxonomy = 'category' AND t.term_id IN (".join(',', $cates).") AND r.object_id = `".$table_posts."`.ID
    ))";
    $where = $exclude.'  AND '.$where;
  }
 
  return $where;
}
add_filter('sitemap_exclude_categories', 'sitemap_exclude_categories');

通过 Wordpress 自身提供的 Hook API 来实现功能主要是为了尽可能避免过多地修改原插件的代码，以免插件升级时带来麻烦。现在这样升级插件时只要重做第一步就可以了。

以/%year%/%monthnum%/%postname%.html这样的永久链接结构为例：

1. 打开主题目录下的functions.php文件，添加以下代码：

// 添加分页处理规则
function add_custom_post_rewrite_rules($rules) {
  $custom_rules = array(
    '([0-9]{4})/([0-9]{1,2})/([^/]+)-([0-9]+).html$' => 'index.php?year=$matches[1]&monthnum=$matches[2]&name=$matches[3]&page=$matches[4]',
  );
  $rules = array_merge($custom_rules, $rules);
 
  return $rules;
}
add_filter('post_rewrite_rules', 'add_custom_post_rewrite_rules');
 
// 修改分页链接
function my_wp_link_pages($args = '') {
  $args .= ($args ? '&' : '') . 'echo=0';
  $links = wp_link_pages($args);
  $links = preg_replace_callback('|([0-9]{4}/[0-9]{1,2}/)([^/]+)(.html)(/)([0-9]+)|', 'custom_page_link', $links);
 
  echo $links;
}
 
function custom_page_link($matches) {
  return $matches[1].$matches[2].'-'.$matches[5].$matches[3];
}

2. 打开主题目录下的single.php文件，查找wp_link_pages并替换为my_wp_link_pages。

3. 后台“设置-永久链接”点击一下“保存修改”按钮，大功告成。

至于 life97 同学说的 .html/xxx 形式的链接访问失效，这个可能和服务器设置有关，具体原因我也不是很清楚，不过可以通过在 .htaccess 文件中添加规则来解决此问题，如：

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^([0-9]{4})/([0-9]{1,2})/([^/]+).html/trackback/?$ index.php?year=$1&monthnum=$2&name=$3&tb=1 [L]
RewriteRule ^([0-9]{4})/([0-9]{1,2})/([^/]+).html/feed/(feed|rdf|rss|rss2|atom)/?$ index.php?year=$1&monthnum=$2&name=$3&feed=$4 [L]
RewriteRule ^([0-9]{4})/([0-9]{1,2})/([^/]+).html/(feed|rdf|rss|rss2|atom)/?$ index.php?year=$1&monthnum=$2&name=$3&feed=$4 [L]
</IfModule>

注意添加顺序，不要置于 Wordpress 生成的规则之后。

下面是几种其它永久链接结构的具体修改代码：

• /%year%/%monthnum%%day%/%postname%.html
• /html/%year%/%monthnum%/%day%/%postname%.html

将网卡驱动卸载，重启后 XP 提示发现新硬件，但重新安装了网卡驱动后，一切照旧，依然提示网络电缆没有插好。在我几乎要判断网卡已经坏了的时候，老大凑了过来说拔掉机箱电源后再接上试试。依言照做，还真解决了问题，网卡恢复了正常，囧rz。

细细想来，除了安装 Ubuntu 没对系统做了什么改动，要出问题也只有在这里了。果然，在我试着进入 Ubuntu 系统后再回到 XP 下，系统又提示网络电缆没有插好，但在 Ubuntu 下网卡确工作正常。这个结果实在有些出乎我的意料。好在“断电恢复法”依然有效，不过我担心这样多折腾几次之后网卡是不是真的会挂了 。

mong kon orn aen lae mong kon rong hai
看见脆弱的人看到哭泣的人

bung kon pwud jai gub ruk tee mi
某人为爱而心伤痛

bung kon toom tae toom jai hai daem tee
某人奉献付出全部的心

mai hen waa mi arai keun ma
没看到有任何回报

chun kae yark tum sing tee tum nun peur krai
我只是想要问 那样做是为了谁

tee tum long bpai naed neuy bung mai
一直做下去 疲惫吗 ?

peur kum waa ruk laew arai gor yom ton !
为了爱 甚麽都愿意承受

peur bung kon arai gor yom tum
为了某人 甚麽都愿意做

toom tae took yung tum peur kum waa ruk
奉献付出一切 为了爱而做

dae hark waa ruk laew mai mi arai di
但如果爱了之后 没有甚麽好

lae nun bpai mai dai arai keun
而且久而久之 没有任何回报

ruk bpai tum mai ja ord ton bpai teung nai mi kao jai
为何去爱 要忍受到何时 不明白

jon ma jer ter tee tum chun rong hai tum hai pwud jai gub ruk tee mi
直到遇见你使我哭泣拥有的爱让我伤痛

chun dai toom tae toom jai hai tung tee
我可以奉献付出全部的心

tee hen gor mi dae roy num da
所看见的就只有泪痕

roo lery don ni sing tee tum hai soo ton
现在知道 让我面对承受的事情

you ngub bung kon yung mi kwarm hwung
和某人在一起 拥有希望

peur kum waa ruk laew arai gor yom tum
为了爱甚麽都愿意承受

peur bung kon arai gor yom tum chun tum peur ter tum peur kum waa ruk
即使爱了之后 没有甚麽好

nub pen pee mai mi arai keun chun yung ton bpai
没有任何回报 我依然承受下去

jer gub dua eng teung roo teung kao jai
自己遇到后才知道 才明白

peur kum waa ruk laew arai gor yom tum
为了爱 甚麽都愿意承受

peur bung kon arai gor yom tum chun tum peur ter tum peur kum waa ruk
为了某人 甚麽都愿意做我为你而做为爱而做

dor hai meur ruk laew mai mi arai di
即使爱了以后 没有甚麽好

nub pen pee mai mi arai keun chun yung ton bpai
没有任何回报 我依然承受下去

jer gub dua eng teung kao jai
自己遇到才明白

五云山是西湖群山中的第三座大山，相传山上常有五色祥云盘旋其上，故而名之。可惜天公不作美阴沉沉的还时不时下着毛毛小雨，天上的祥云是无法一睹为快了；不过雨中登山也应当别有一番滋味，不由得想起高中课文《雨中登泰山》来。

山路掩在丛林之中，夹着淅淅沥沥的雨声，却显得格外的幽静。有人提醒注意脚下的石阶，遇到祥云，以脚踩之可沾祥瑞之气——原来祥云还有另外一番说法。山路颇缓，让人没有兴奋感，所以我们偶尔也抄抄陡峭的小道。一路上碰到不少参加西湖跑山赛的选手，很是佩服他们参赛的勇气。

约莫一个时辰左右，我们便到山顶了。一踏上山顶，便被那桩银杏树所吸引，树干粗大，恐五人不能合围。走进一看，树干已中空，有被烧过的痕迹，再看石碑介绍得知这银杏树距今已有一千四百余年了依然巍然耸立，不由得顿生感慨。树后白墙黑瓦，是一座寺庙。寺内供奉着各路神仙，香火颇盛。找寻最后一朵祥云时，在左侧的庭院看见了伟人的题词，算是个意外的收获。

合影留念之后，我们决定往北取道十里锒铛然后入梅家坞FB，这时没停歇多久的雨又开始下了起来。十里锒铛的名头倒是听过，走在古道之上，想起古时的货郎挑货挑担翻山越岭，自是没有我们这么悠闲。

看了那些评论，都是冲着这篇文章去的，有些奇怪。继续观察中……

更新：
貌似 Spammer 只盯上了上文提到的那篇日志，在关闭评论和引用功能后，垃圾评论便不再出现了。

很少去关心歌词的内容，因为我觉得音乐本身就足够了，但却认真读了这首歌的歌词。Trouble is a friend，很有意思的提法，也许这就是一种人生态度。

PS: 套用一下 wayne 的话，这里改叫做每月一歌好了。

Trouble will find you no matter where you go, oh oh
No matter if you're fast, no matter if you're slow, oh oh
The eye of the storm wanna cry in the morn, oh oh
You're fine for a while but you start to lose control
He's there in the dark, he's there in my heart
He waits in the wings, he's gotta play a part
Trouble is a friend, yeah trouble is a friend of mine
Ahh..

And no matter what I feed him he always seems to grow, oh oh
He sees what I see and he knows what I know, oh oh
So don't forget as you ease on down my road
He's there in the dark, he's there in my heart
He waits in the wings, he's gotta play a part
Trouble is a friend, yeah trouble is a friend of mine
So don't be alarmed if he takes you by the arm
I roll down the window, I'm a sucker for his charm
Trouble is a friend, yeah trouble is a friend of mine
Ahh..

How I hate the way he makes me feel
And how I try to make him leave
I try, oh oh I try
But he's there in the dark, he's there in my heart
He waits in the wings, he's gotta play a part
Trouble is a friend, yeah trouble is a friend of mine
So don't be alarmed if he takes you by the arm
I roll down the window, I'm a sucker for his charm
Trouble is a friend, yeah trouble is a friend of mine

Ahh..
Ooh..
Ahh..
Ooh..

Now what if I never kiss your lips again
Or feel the touch of your sweet embrace
How would I ever go on?
Without you there's no place to belong
Well someday love is going to lead you back to me
But till it does I'll have an empty heart
So I'll just have to believe some where out there you're thinking of me

Till the day I let you go
Until we say our next hello its not goodbye
Till I see you again
I'll be right here remembering when
And if time is on our side
There will be no tears to cry on down the road
There is one thing I can't deny its not goodbye

You think I'd be strong enough to make it through
And rise above when the rain falls down
But it抯 so hard to be strong when you've been missing somebody so long
It's just a matter of time I'm sure
Well time takes time and I can't hold on
So won't you try as hard as you can
Put my broken heart together again?

Till the day I let you go
Until we say our next hello its not goodbye
Till I see you again
I'll be right here remembering when
And if time is on our side
there will be no tears to cry on down the road
there is one thing I can't deny its not goodbye

It's not goodbye
Till the day I'll let you go
until we say our next hello its not goodbye
Till I see you again
I'll be right here remembering when
And if time is on our side
there will be no tears to cry on down the road
And I can't deny it's not goodbye
Its not goodbye
Till I see you
I'll be right here remembering when
Time is on our side
No more tears to cry
And I cant deny
It's not goodbye
Goodbye
no more tears to cry
It's it's not goodbye