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sudo apt-get install -y dkms

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## 安装当前版本内核头文件
sudo apt-get install -y linux-headers-`uname -r` 

## 安装相关工具
sudo apt-get install -y make gcc bc git

## 克隆代码，然后编译安装
git clone https://github.com/brektrou/rtl8821CU.git
cd rtl8821CU && sudo bash dkms-install.sh

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gpg --full-generate-key

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gpg (GnuPG) 2.2.27; Copyright (C) 2021 Free Software Foundation, Inc.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Please select what kind of key you want:
   (1) RSA and RSA (default)
   (2) DSA and Elgamal
   (3) DSA (sign only)
   (4) RSA (sign only)
  (14) Existing key from card

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RSA keys may be between 1024 and 4096 bits long.
What keysize do you want? (3072)

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Requested keysize is 4096 bits
Please specify how long the key should be valid.
         0 = key does not expire
      <n>  = key expires in n days
      <n>w = key expires in n weeks
      <n>m = key expires in n months
      <n>y = key expires in n years
Key is valid for? (0)

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lqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqk
x Please enter the passphrase to                       x
x protect your new key                                 x
x                                                      x
x Passphrase: ________________________________________ x
x                                                      x
x       <OK>                              <Cancel>     x
mqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqj

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生成一个用于此用途的子密钥。
pub   rsa4096 2023-08-07 [SC] [expires：2024-08-06]
      AC27EFC2205EE9272D6B87F8DD6E204C56810DCB
uid                      tqcq <[email protected]>

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gpg --edit-key tqcq

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# 这里的 gpg> 是 gpg 的交互模式提示符，不需要输入
gpg> addkey

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Please select what kind of key you want:
   (3) DSA (sign only)
   (4) RSA (sign only)
   (5) Elgamal (encrypt only)
   (6) RSA (encrypt only)
   (7) DSA (set your own capabilities)
   (8) RSA (set your own capabilities)
  (10) ECC (sign only)
  (11) ECC (set your own capabilities)
  (12) ECC (encrypt only)
  (13) Existing key
Your selection? 10

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Please select which elliptic curve you want:
   (1) Curve 25519 *default*
   (2) Curve 448
   (3) NIST P-256
   (4) NIST P-384
   (5) NIST P-521
   (6) Brainpool P-256
   (7) Brainpool P-384
   (8) Brainpool P-512
   (9) secp256k1
Your selection? 1

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## 查看子密钥的 keyid
gpg --list-keys --keyid-format=long 

## git 设置签名密钥
git config --global user.signingkey <sub-key-id>
## 设置每次commit自动签名
git config --global commit.gpgsign true

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gpg --armor --export <sub-key-id>

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## Mac
defaults write com.google.Chrome URLAllowlist -array-add 'x-devonthink://*'

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              Mon Nov 13 01:13:50 PM UTC 2023
         ┌                                        ┐
  123456 ┤■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■ 2022.0
    1234 ┤■■■■■■■■■■■■■■■■■■ 1118.0
   admin ┤■■■■■■■■■■■■■■■ 954.0
    root ┤■■■■■■■■■■■■■■■ 918.0
     123 ┤■■■■■■■■■■■■■ 818.0
    test ┤■■■■■■■■■■■■ 745.0
   12345 ┤■■■■■■■■■■■■ 743.0
password ┤■■■■■■■■■■■ 701.0
    toor ┤■■■■■■■■■■ 602.0
  qwerty ┤■■■■■■■■■ 567.0
         └                                        ┘

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grep 'authentication for user.*with password' log.txt  | \
  awk '{print $10}' | \
  sort | \
  uniq -c | \
  sort -nrk1 | \
  head -n10 |  \
  awk '{print $2, $1}' | \
  uplot bar -d ' '  -t "`date`"

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docker pull $BASE_IMAGE` || echo "no image"
docker build --cache-from $BASE_IMAGE -t mytag

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# 拷贝执行下面的代码即可在当前目录生成许可证
ResilioSyncProKey="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"
echo $ResilioSyncProKey | base64 -d > ResilioSyncPro.btskey

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extern int epoll_create (int __size) __THROW;
extern int epoll_create1 () // 相比 epoll_create，增加了flags参数
extern int epoll_ctl (int __epfd, int __op, int __fd,
                struct epoll_event *__event) __THROW;
extern int epoll_wait (int __epfd, struct epoll_event *__events,
                 int __maxevents, int __timeout)
extern int epoll_pwait () // 可以设置阻塞过程中忽略的信号，防止被打断
extern int epoll_pwait2 () // 相比 epoll_wait 增加了超时控制

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// #include <sys/epoll.h>

int epollfd = epoll_create1(0);
if (epollfd == -1) { // 返回 -1 代表失败, 这里必须检查
    perror("epoll_create1");
    return EXIT_FAILURE;
}

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// #include <sys/socket.h>
// #include <sys/types.h>

#define DEFAULT_PORT 8080
#define MAX_EVENTS 10

int ret = 0;
// ========= 创建 servfd =========
int servfd = socket(AF_INET /* IPv4 */, SOCK_STREAM, 0);
if (servfd == -1) {
    // check error msg by errno
    perror("socket error");
    return -1
}

struct sockaddr_in servaddr;
memset(&servaddr, 0, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
servaddr.sin_port = htons(DEFAULT_PORT);

ret = bind(servfd, (struct sockaddr*) &servaddr, sizeof(servaddr));
if (ret == -1) {
    // check error msg by errno
    perror("bind error");
    return -1;
}

/**
 * Linux2.2之前， 1024 是未完成链接队列最大长度，
 * Linux2.2之后，表示完成连接等待应用处理的队列长度，如果需要制定等待连接的队列长度，请使用 tcp_max_syn_backlog (man 7 tcp 可以查看细节)
 */
ret = listen(servfd, 1024); 
if (ret == -1) {
    // check error msg by errno
    perror("listen error");
    return -1
}
// ========= 创建 servfd 结束 =========
/**
 * struct epoll_event
 * {
 *   uint32_t events;         // Epoll events
 *   epoll_data_t data;     // User data variable
 * } __EPOLL_PACKED;
 **/
struct epoll_event ev;
struct epoll_event events[MAX_EVENTS];

ev.event = EPOLLIN; // set read event
ev.data.fd = servfd;

for (;;) {
    int nready = epoll_wait(epollfd, events, MAX_EVENTS, -1);
    if (nready == -1) {
        perror("epoll_wait error");
        return -1;
    }
    
    for (int i = 0; i < nready; i++) {
        if (events[i].data.fd == servfd) {
            int connfd = accept(servfd, (struct sockaddr*) &cliaddr, &addrlen);
            if (connfd == -1) {
                    perror("accept error");
                return -1;
            }
            
            setnonblocking(connfd);
            // 设置 读事件监听、ET模式
            ev.events = EPOLLIN | EPOLLET;
            ev.data.fd = connfd;
            // 这里添加客户端的 fd 到epoll中
            if (epoll_ctl(epollfd, EPOLL_CTL_ADD, connfd, &ev) == -1) {
                perror("epoll_ctl: EPOLL_CTL_ADD error");
                return -1;
            }
        } else {
            // pass
            // 这里处理客户端sock的事件
        }
    }
}

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# mkdir rxcpp-study
# cd rxcpp-study
# touch CMakeList.txt main.cpp
# tree
.
├── CMakeLists.txt
└── main.cpp

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cmake_minimum_required(VERSION 3.25)
project(rxcpp_study)

set(CMAKE_CXX_STANDARD 17)

add_executable(rxcpp_study main.cpp)

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#include <iostream>

int main() {
    std::cout << "Hello, World!" << std::endl;
    return 0;
}

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# 首先创建一个 build 目录，避免污染源代码目录
mkdir build && cd build
# 开始生成配置文件
cmake ..
# 用 make 构建项目
make
# 以上完成之后，可以得到 rxcpp_study
./rxcpp_study
# 执行完毕之后应该有以下输出:
# Hello, World!

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# 首先用git管理仓库
# 首先创建一个 third_party 目录来统一管理第三方库
mkdir third_party

# 接下来将 RxCpp 放到该目录 
git submodule add https://github.com/ReactiveX/RxCpp/ third_party/RxCpp

# 刚 clone 的 RxCpp是默认分支，可能与本笔记版本不同，我们切换到统一版本
cd third_party/RxCpp
git checkout 761b932a80e2be6e2b62d232e754bd96fc448946

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cmake_minimum_required(VERSION 3.25)
project(rxcpp_study)

set(CMAKE_CXX_STANDARD 17)

add_executable(rxcpp_study main.cpp)
## 以下是导入RxCpp 的头文件
target_include_directories(rxcpp_study
        PRIVATE "${CMAKE_CURRENT_SOURCE_DIR}/third_party/RxCpp/Rx/v2/src")

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#include <iostream>
#include <rxcpp/rx.hpp>

int main() {
    rxcpp::observable<>::range(1, 5)
        .as_blocking()
        .subscribe([](int value){ std::cout << value << std::endl;},
                   [](){});
    return 0;
}