已经测试成功自动备份和自动压缩备份数据库文件

Author: Tinywan

Lua-Script/metatable/__add.lua

@@ -0,0 +1,33 @@
+--
+-- Created by IntelliJ IDEA.
+-- User: Administrator
+-- Date: 2017/6/6
+-- Time: 8:57
+-- To change this template use File | Settings | File Templates.
+--
+--在 Lua 5.1 语言中，元表 (metatable) 的表现行为类似于 C++ 语言中的操作符重载，例如我们可以重载 "__add" 元方法 (metamethod)，来计算两个 Lua 数组的并集；或者重载 "__index" 方法，来定义我们自己的 Hash 函数。Lua 提供了两个十分重要的用来处理元表的方法，如下：
+--setmetatable(table, metatable)：此方法用于为一个表设置元表。
+--getmetatable(table)：此方法用于获取表的元表对象
+
+------------------------------------------------------ 通过重载 "__add" 元方法来计算集合的并集实例：
+local set1 = {10,20,30}
+local set2 = {40,50,60}
+-- 将用于重载__add的函数，注意第一个参数是self
+local union = function (self, another)
+    local set = {}
+    local result = {}
+
+    -- 利用数组来确保集合的互异性
+    for i, j in pairs(self) do set[j] = true end
+    for i, j in pairs(another) do set[j] = true end
+
+    -- 加入结果集合
+    for i, j in pairs(set) do table.insert(result, i) end
+    return result
+end
+setmetatable(set1, {__add = union}) -- 重载 set1 表的 __add 元方法
+
+local set3 = set1 + set2
+for _, j in pairs(set3) do
+    io.write(j.." ")               -->output：30 50 20 40 10
+end

Nginx-Rtmp/Shell_script.md

@@ -0,0 +1,69 @@
+##  SHELL脚本
++   [如何不耍流氓的做运维之-SHELL脚本](http://mp.weixin.qq.com/s/aI3ha5BvzIvqpn2ddAK5zQ)
++   [已经测试成功自动备份和自动压缩备份数据库文件](https://github.com/Tinywan/Lua-Nginx-Redis/blob/master/Nginx-Rtmp/slimp_backup_db.sh)
+##  SHELL脚本小技巧
+```bash
+#!/bin/bash
+#######################################################
+# $Name:         shell_template.sh
+# $Version:      v1.0
+# $Function:     Backup MySQL Databases Template Script
+# $Author:       Jason Zhao
+# $organization: https://www.unixhot.com/
+# $Create Date:  2016-08-27
+# $Description:  You know what i mean,hehe
+#######################################################
+
+# Shell Env
+SHELL_NAME="shell_template.sh"
+SHELL_DIR="/opt/shell"
+SHELL_LOG="${SHELL_DIR}/${SHELL_NAME}.log"
+LOCK_FILE="/tmp/${SHELL_NAME}.lock"
+
+#Write Log 
+shell_log(){
+    LOG_INFO=$1
+    echo "$(date "+%Y-%m-%d") $(date "+%H-%M-%S") : ${SHELL_NAME} : ${LOG_INFO}" >> ${SHELL_LOG}
+}
+
+# Shell Usage shell_usage函数，用来告诉用户，这个脚本的使用方法
+shell_usage(){
+    echo $"Usage: $0 {backup}"
+}
+
+#   函数shell_lock和shell_unlock非常简单，就是创建一个锁文件
+shell_lock(){
+    touch ${LOCK_FILE}
+}
+
+shell_unlock(){
+    rm -f ${LOCK_FILE}
+}
+
+# Backup MySQL All Database with mysqldump or innobackupex
+mysql_backup(){
+    if [ -f "$LOCK_FILE" ];then
+        shell_log "${SHELL_NAME} is running"
+        echo "${SHELL_NAME}" is running && exit
+    fi
+    shell_log "mysql backup start"
+    shell_lock
+    sleep 10
+    shell_log "mysql backup stop"
+    shell_unlock
+}
+
+# Main Function
+main(){
+    case $1 in
+        backup)
+            mysql_backup
+            ;;
+        *)
+            shell_usage;
+    esac
+}
+
+#Exec
+main $1
+```

Nginx-Rtmp/shell_usage.sh

@@ -0,0 +1,64 @@
+#!/bin/bash
+#######################################################
+# $Name:         shell_template.sh
+# $Version:      v1.0
+# $Function:     Backup MySQL Databases Script
+# $Author:       ShaoBo Wan
+# $organization: https://github.com/Tinywan
+# $Create Date:  2017-06-27
+# $Description:  定期备份MySQL数据库
+#######################################################
+
+# Shell Env
+SHELL_NAME="backup_db.sh"
+SHELL_DIR="/home/www/database_back"
+SHELL_LOG="${SHELL_DIR}/${SHELL_NAME}.log"
+LOCK_FILE="/tmp/${SHELL_NAME}.lock"
+BACKUP_NAME="${SHELL_DIR}/${SHELL_NAME}.log"
+
+#Write Log
+shell_log(){
+    LOG_INFO=$1
+    echo "$(date "+%Y-%m-%d") $(date "+%H-%M-%S") : ${SHELL_NAME} : ${LOG_INFO}" >> ${SHELL_LOG}
+}
+
+# Shell Usage shell_usage函数，用来告诉用户，这个脚本的使用方法
+shell_usage(){
+    echo $"Usage: $0 {backup}"
+}
+
+#   函数shell_lock和shell_unlock非常简单，就是创建一个锁文件
+shell_lock(){
+    touch ${LOCK_FILE}
+}
+
+shell_unlock(){
+    rm -f ${LOCK_FILE}
+}
+
+# Backup MySQL All Database with mysqldump or innobackupex
+mysql_backup(){
+    if [ -f "$LOCK_FILE" ];then
+        shell_log "${SHELL_NAME} is running"
+        echo "${SHELL_NAME}" is running && exit
+    fi
+    shell_log "mysql backup start"
+    shell_lock
+    sleep 10
+    shell_log "mysql backup stop"
+    shell_unlock
+}
+
+# Main Function
+main(){
+    case $1 in
+        backup)
+            mysql_backup
+            ;;
+        *)
+            shell_usage;
+    esac
+}
+
+#Exec
+main $1

Nginx-Rtmp/slimp_backup_db.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+#This is mysql mysqldaiybak scripts
+#2015-05-01
+database=weblive
+databak_dir=/home/www/database_back
+logs_dir=/home/www/database_back/logs
+dumpbin=/usr/bin/mysqldump
+
+DATE=$(date +%Y%m%d)
+date_time=$(date +"%y-%m-%d %H:%M:%S")
+backup_name=sansan_bak1_${DATE}.sql
+logFile=$logs_dir/sansan_${DATE}.log
+
+echo "  " > $logFile
+echo "-------------$(date +"%y-%m-%d %H:%M:%S") backup start ----------------------" >> $logFile
+
+$dumpbin $database >$databak_dir/$backup_name
+/bin/bzip2 $backup_name
+cd $databak_dir
+# 1 mouth = 44640 min
+find ./ -mindepth 1 -maxdepth 3 -type f -name *.bz2 -mmin +43200 | xargs rm -rf
+find ./ -mindepth 1 -maxdepth 3 -type f -name *.sql -mmin +1440 | xargs rm -rf
+echo "-------------$(date +"%y-%m-%d %H:%M:%S") backup end ----------------------" >> $logFile

README.md

@@ -10,6 +10,7 @@
     - [x]   编写快速安全Bash脚本的建议 
     - [x]   Shell脚本实现分日志级别记录日志  
     - [x]   Nginx日志定时备份和删除 
+    - [x]   SHELL脚本小技巧 
 +   [Lua基础知识](#Lua_base_knowledge) 
     +   [Lua 基础语法](#Lua-base)
     +   [luajit 执行文件默认安装路径](#Nginx_base_knowledge) 
@@ -117,6 +118,7 @@
 +   [编写快速安全Bash脚本的建议](https://github.com/Tinywan/Lua-Nginx-Redis/blob/master/Shell/write-shell-suggestions.md) 
 +   [shell脚本实现分日志级别记录日志](https://github.com/Tinywan/Lua-Nginx-Redis/blob/master/Nginx-Rtmp/Shell_Log.sh)   
 +   [Nginx日志定时备份和删除](https://github.com/Tinywan/Lua-Nginx-Redis/blob/master/Nginx-Rtmp/Shell_Nginx_Log_cut.sh)   
++   [SHELL脚本小技巧](https://github.com/Tinywan/Lua-Nginx-Redis/blob/master/Nginx-Rtmp/Shell_script.md)   
 ## <a name="Lua_base_knowledge"/>  Lua基础知识
 #### Lua 基础语法 <a name="Lua-base"/>
 +   删除一个全局变量，只要将变量值赋值为nil：`a = nil`,当且仅当一个变量不为nil 时，这个变量存在
@@ -523,7 +525,7 @@
         
         local t1 = {}
         local t2 = {}
-        local mt = { __index = smartMan } -- __index 可以是一个函数，也可以是一个函数
+        local mt = { __index = smartMan } -- __index 可以是一个表，也可以是一个函数
         setmetatable(t1, mt)
         setmetatable(t2, mt)
         print(t1.money)