jhjguxin

nginx 403 Forbidden Error hosting in User Home Directory

resources

• http://serverfault.com/questions/416787/nginx-403-forbidden-error-hosting-in-user-home-directory
• rails deploy with rvm, capistrano, uniron, nginx

runtime environment

jhjguxin

GPG 加密解密简明教程

大家都知道，互联网上充斥着大量的明文传输方式，可以说绝对是不安全地带。那么，我们如何保证在不安全的互联网中更可靠的传输重要数据呢？个人认为最好的方式之一就是使用 GPG 工具进行加密。此文只是简单介绍了 GPG 的常规用法，重在推广和普及 GPG 加密工具，详细的使用请参见 GPG 手册。

名词解释

RSA / DSA / ElGamal : 是指加密算法

GPG :（全称 GnuPG ) 是一款非对称加密(PGP)的免费软件，非对称加密方式简单讲就是指用公钥加密文件，用私钥解密文件。如果你想给谁发送加密信息，首先你要得到他的公钥，然后通过该公钥加密后传给他，对方利用自已的私钥就可解密并读取文件了。

jhjguxin

Activate MS Office 2019/2016 for macOS - Microsoft_Office_2019_VL_Serializer

Office 2019 above

2019-06-03

Note that Office2019 DO NOT support activate via simple copy/paste plist license file which is the simplest way to activate Office 2016. Fortunately, you can also use the VL Serializer tool, just install Office 2019 and Serializer, then run Serializer to activate.

Ref

jhjguxin

# encoding: UTF-8
class GxApp
  include Mongoid::Document
  include Mongoid::Timestamps
  include Mongoid::Sequence

  store_in session: "gxservice"

  field :name, type: String, default: "Guanxi.me"
  field :version, type: String

jhjguxin

Linux and Unix operating systems comes in a wide range of flavors often bundled as different distributions by different vendors. Every one of these distribution also comes with an often pre-defined and latest version of the Linux kernel. Sometimes you need to know the exact name and version of your operating system, machine as well as the kernel, be it to install the correct version of a software, find if a hardware is compatible or be it to upgrade your OS itself. There are several ways to check your operating system and linux kernel versions. As each distribution (or distros) are slightly different some of the commands might work in some distros while some maynot.

uname

uname is the linux command which prints out the name, versions and other details of the machine and kernel running on the machine. It is basically short for Unix Name. This is usually part of the core-utils package and should be available on almost all distros. There are several options available to print out just the kernel detail

jhjguxin

class UserObserver < Mongoid::Observer

  def after_save(record)
    expire_cache(record)
  end

  private
  def expire_cache(record)
    Rails.cache.delete("user:#{record.id}")
  end

jhjguxin

In this article, I'll walk through a basic Rails (3.2.x) setup for creating a nested resource for two models. Nested resources work well when you want to build out URL structure between two related models, and still maintain a RESTful convention. This code assumes you are running RVM to manage Ruby/Gem versions, and Git for version control.

Creating a new Rails project

$ mkdir family # create rvm gemset 
$ echo "rvm use --create ruby-1.9.2@family" > family/.rvmrc 
$ cd family # install rails 
$ gem install rails # create new rails project 
$ rails new . # version control 

jhjguxin

How to display and kill zombie processes

finding if zombies exist

• execute the top command
• one line is tasks:
  • Example output: Tasks: 63 total, 1 running, 61 sleeping, 0 stopped, 1 zombie

Who is zombie

jhjguxin

require 'axlsx'

Axlsx::Package.new do |package|
  workbook = package.workbook
	workbook.add_worksheet do |sheet|
		wrap = workbook.styles.add_style alignment: {wrap_text: true}
		sheet.add_row ["Foo\r\nBar", "Foo\rBar", "Foo\nBar", "Foo\n\r\nBar"], style: wrap
	end

	package.serialize "linebreak.xlsx"

jhjguxin

1. 查看MySQL服务器配置信息

mysql> show variables;

2. 查看MySQL服务器运行的各种状态值

mysql> show global status;