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推包包含 Git 信息, Docker 等
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DevOps/CI.md

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### 设置最后封板时间并严守,以便有足够的时间编译程序包做回归测试
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### 编译日志同时保存到文件后用工具解析出错行作者,根据时间倒序发邮件
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`2>&1|tee maven.log`
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### 任何脚本运行的操作都要搜下是否有乱码的可能
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- 标签不支持空格和冒号,不能用`yyyy-MM-dd HH:mm:ss`
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- 空格换成下划线的话双击时会连带选择
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- 逗号常用于分割符
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- 如果是比较高的符号会影响视觉分隔效果
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- 虽然大写更有美感也符合转悠名词的习惯\
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- 但是是较高的符号会影响视觉分隔效果,所以用下划线
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- 英文逗号常用于分割符,所以用英文句号
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- 虽然大写更有美感也符合专有名词的习惯\
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但在输入时不便,视觉辨识度也较低,所以用小写
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所以用下划线:
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```
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prd_yyyy-mm-dd_hh.mm.ss
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DevOps/Nginx.md

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# Nginx
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### 使用 alias 便于本地文件夹可以不用和 location 同名
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- root,实际的路径就是:root值 + location值。
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- alias,实际的路径就是:alias值。
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### 不要用 root 启动避免后面非 root 报 Premature EOF
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在 nginx.conf 中配置 user 启动用户
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### 修复漏洞更新时不用重启命令
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访问 404 网页看到的仍是旧版
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### 设置 Nginx 的 body 大小避免请求失败
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```
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client_max_body_size 8m;

DevOps/docker/Docker_CentOS7.md

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# Docker CentOS 7 常用设置
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### centos8 停止维护,所以下 7
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```
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docker pull centos:centos7
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```
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阿里云yum(centos7不用也行):http://mirrors.aliyun.com/repo/
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### 特权启动设置时区
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避免报错 Failed to get D-Bus connection: Operation not permitted
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```
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docker run -d --name centos7 --privileged=true centos:centos7 /usr/sbin/init -e TZ=Asia/Shanghai
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```
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### 同步阿里云时间
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```
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timedatectl set-timezone Asia/Shanghai
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yum install ntpdate -y
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ntpdate ntp.aliyun.com
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```
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### 安装 locate 命令并初始化
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```
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yum install mlocate -y
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updatedb
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```
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### 别自己编译 gcc,会遇到很多问题
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安装并切换到 gcc 11 环境
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```
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yum install -y http://mirror.centos.org/centos/7/extras/x86_64/Packages/centos-release-scl-rh-2-3.el7.centos.noarch.rpm
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yum install -y http://mirror.centos.org/centos/7/extras/x86_64/Packages/centos-release-scl-2-3.el7.centos.noarch.rpm
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yum install devtoolset-11-gcc-c++
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scl enable devtoolset-11 bash
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```
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如果以后都用 gcc 11 可以改下链接
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```
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mv /usr/bin/gcc /usr/bin/gcc-4.8.5
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ln -s /opt/rh/devtoolset-11/root/bin/gcc /usr/bin/gcc
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```

DevOps/docker/Docker_Win.md

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# Docker Windows 版
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### 安装云缓存的旧版,避免新版各种启动失败
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https://mirrors.aliyun.com/docker-toolbox/windows/docker-for-windows/stable
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```json
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{
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"builder": {
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"gc": {
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"defaultKeepStorage": "20GB",
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"enabled": true
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}
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},
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"experimental": false,
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"features": {
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"buildkit": true
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},
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"registry-mirrors": [
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"http://hub-mirror.c.163.com",
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"https://docker.mirrors.ustc.edu.cn",
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"https://registry.docker-cn.com",
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"https://6kx4zyno.mirror.aliyuncs.com"
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]
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}
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```

DevOps/docker/README.md

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# Docker
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DevOps/linux/sh_mnemonic.md

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# 助记语:你不替食堂熬汤
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nbtstat -A IP
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```
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## 端口查进程
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```batch

business/README.md

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# 业务应用

db/SQL.md

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# SQL
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### 比较时都用字符串比较,MyBatis 用 #{} 自动加引号,避免类似 1='1xxx' 成立导致问题
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### `INSERT`语句建议在工具上编辑好值后使用将所选行导出为`INSERT`语句的方式
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在工具中编辑是为了方便在图形界面中观察每条记录的差别,导出的语句方便也避免了繁琐的语法编辑和错漏。

db/comment/Oracle_comment.sql

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SELECT * FROM SYS.ALL_TAB_COMMENTS WHERE OWNER = '库名' AND COMMENTS IS NULL;
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-- 查询所有没注释的列
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SELECT * FROM SYS.ALL_COL_COMMENTS WHERE OWNER = '库名' AND COMMENTS IS NULL;
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SELECT * FROM SYS.ALL_COL_COMMENTS WHERE OWNER = '库名' AND COMMENTS IS NULL;
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-- 表注释转语句 同步注释用
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SELECT 'COMMENT ON TABLE '||OWNER||'.'||TABLE_NAME||' IS '''||COMMENTS||''';'
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FROM SYS.ALL_TAB_COMMENTS WHERE OWNER = '库名' AND COMMENTS IS NOT NULL;
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-- 列注释转语句 同步注释用
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SELECT 'COMMENT ON COLUMN '||OWNER||'.'||TABLE_NAME||'.'||COLUMN_NAME||' IS '''||COMMENTS||''';'
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FROM SYS.ALL_COL_COMMENTS WHERE OWNER = '库名' AND COMMENTS IS NOT NULL;

db/transaction.md

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| 重入 | | MAC + jvm进程ID + 线程ID | 与当前最小节点对比 |
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| 单点 | | 集群部署 | 集群部署 |
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## 分布式事务
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- 分支事务执行时要拒绝回滚执行
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- 已经失败的事务直接返回回滚成功
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- 多次收到分支事务要幂等

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