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echo "========install extension begin==========="
PHP_PATH='/usr/local/php'
PHP_CONFIG_PATH=$PHP_PATH"/php-config"
PHP_INI_PATH=$PHP_PATH"/php.ini"
PHPIZE_PATH=$PHP_PATH"/phpize"
PHP_EXTENSION_PATH=$PHP_PATH"/lib/php/extensions/no-debug-non-zts-20151012"

echo "========install yar==========="
wget http://pecl.php.net/get/yar-2.0.4.tgz
tar zxvf yar-2.0.4.tgz

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#nginx的gzip模块需要zlib库，rewrite模块需要pcre库，ssl模块需要openssl库，查看程序是否已安装：
rpm -q pcre
rpm -q openssl
rpm -q zlib
rpm -q nginx

#!/usr/bin/env bash
#创建用户和组
echo "======创建用户和组======"
/usr/sbin/groupadd -f www

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http请求报头

Query String Parameters

// General
Request URL: http://foo.com?x=1&y=2
Request Method: GET

// Query String Parameters
x=1&y=2

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centos7下安装Hadoop2.6

• 假设当前有三台机器，分别是
• 192.168.33.100 hadoop-master
• 192.168.33.200 hadoop-slave01
• 192.168.33.300 hadoop-slave02

配置系统环境

3台机器均要做以下操作

• 配置host

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install go

download from this url:https://golang.org/dl/

check if install success

go version
ll /usr/local/go

set config

vim ~/.bash_profile

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<script>
var obj = {
	"name": "hello"
}
function test(a,b,c) {
	console.log(this.name)
	console.log(a,b,c)
}
test.call(obj,1,2,3)

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<script type="text/javascript">
const a = {a:1}
console.log(a)
console.log("===================")
const b = Object.create(null,{
	a: {
		writable:true,
		configurable:true,
 value: 2

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prototype

标识原型，对象通过原型可挂载到类上（继承）

function Obj(param) {
  this.a = param
}
Obj.prototype.print = function() {
  console.log(this.a)
}

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create table test( id int(10) not null AUTO_INCREMENT,name varchar(3), PRIMARY KEY(id), UNIQUE KEY uqe_name(name) ) engine=innodb charset=utf8;
INSERT INTO test (id, name) VALUES (1, 'aa'), (2, 'bb'), (3, 'cc');

myisam索引

非聚集索引，索引和记录是分开存放的

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#!/bin/bash
set -u

# First check if the OS is Linux.
if [[ "$(uname)" = "Linux" ]]; then
  HOMEBREW_ON_LINUX=1
fi

# On macOS, this script installs to /usr/local only.
# On Linux, it installs to /home/linuxbrew/.linuxbrew if you have sudo access