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修改主题下的index.php

将如下代码放在$this->need('header.php');后

/** 文章置顶 */
$sticky = '1'; //置顶的文章id，多个用|隔开
if($sticky){
    $sticky_cids = explode('|',$sticky); //分割文本
    $sticky_html = "<span style='color:red'>[置顶] </span>"; //置顶标题的 html

    $db = Typecho_Db::get();
    $pageSize = $this->options->pageSize;
    $select1 = $this->select()->where('type = ?', 'post');
    $select2 = $this->select()->where('type = ? && status = ? && created < ?', 'post','publish',time());

    //清空原有文章的列队
    $this->row = [];
    $this->stack = [];
    $this->length = 0;

    $order = '';
    foreach($sticky_cids as $i => $cid) {
        if($i == 0) $select1->where('cid = ?', $cid);
        else $select1->orWhere('cid = ?', $cid);
        $order .= " when $cid then $i";
        $select2->where('table.contents.cid != ?', $cid); //避免重复
    }
    if ($order) $select1->order('', "(case cid$order end)"); //置顶文章的顺序 按 $sticky 中 文章ID顺序
    if ($this->_currentPage == 1) foreach($db->fetchAll($select1) as $sticky_post){ //首页第一页才显示
        $sticky_post['sticky'] = $sticky_html;
        $this->push($sticky_post); //压入列队
    }

    $uid = $this->user->uid; //登录时，显示用户各自的私密文章
    if($uid) $select2->orWhere('authorId = ? && status = ?',$uid,'private');

    $sticky_posts = $db->fetchAll($select2->order('table.contents.created', Typecho_Db::SORT_DESC)->page($this->_currentPage, $this->parameter->pageSize));
    foreach($sticky_posts as $sticky_post) $this->push($sticky_post); //压入列队
    $this->setTotal($this->getTotal()-count($sticky_cids)); //置顶文章不计算在所有文章内
}

修改私钥密码：ssh-keygen -f private_key -p
LNMP环境IP访问网站：/usr/local/nginx/conf/vhost/host.conf server_name 添加IP地址
awk printf 不会插入换行符
获取WiFi连接设备MAC：hostapd_cli list_sta | awk 'NR>1{print $1}'
Read-only file system：mount -o remount,rw /
网络adb：adb connect ip_address:port

#include <stdio.h>
#include <string.h>

//867897040644636
#define IMEI "86789704064463"

int getIMEICheckDigit(char *imei)
{
    int i, sum1 = 0, sum2 = 0, temp, result = 0;

    for (i = 0; i < strlen(imei); i++) {
        if (i % 2 == 0) {
            sum1 += imei[i] - '0';
        } else {
            temp = (imei[i] - '0') * 2;
            sum2 += temp;
            if (temp >= 10) {
                sum2 -= 9;
            }
        }
    }
    temp = (sum1 + sum2) % 10;
    if (temp != 0) {
        result = 10 - temp;
    }

    return result;
}

int main(int argc, char *agrv[])
{
    printf("IMEI %s check digit is %d\n", IMEI, getIMEICheckDigit(IMEI));

    return 0;
}

计算->实例->实例详细信息->附加的VNIC->VNIC详细信息->IPv4地址->编辑->临时公共IP->更新

查看centos版本：cat /etc/redhat-release
设置时区：timedatectl set-timezone Asia/Shanghai
启动时间：date -d "$(awk -F. '{print $1}' /proc/uptime) second ago" +"system boot:%Y-%m-%d %H:%M:%S"
运行时间：cat /proc/uptime | awk -F. '{run_days = $1 / 86400; run_hour = ($1 % 86400) / 3600; run_minute = ($1 % 3600) / 60; run_second = $1 % 60; printf("系统已运行：%d天%d时%d分%d秒\n", run_days, run_hour, run_minute, run_second)}'
切换至上次目录：cd -
清空至行首：Ctrl+U
清空至行尾：Ctrl+K
移动至行首：Ctrl+A
移动至行尾：Ctrl+E