ericchen

# firewall
ufw allow ssh
ufw allow http
ufw allow https
ufw logging on
ufw enable

# check rule
ufw status numbered

ericchen

1. 安装 sudo apt-get install ncdu
2. 运行ncdu就可以查看各目录所占空间
3. (注意：如果文件已经删除了，但是还有残留的进程引用它，df看到的空间使用量并没有减去那些已经删除的文件, 这时需要停止相应的进程) 碰到这种情况就需要运行以下命令: lsof / | grep deleted
4. 相关文章参考：https://www.digitalocean.com/community/questions/cannot-find-what-is-filling-up-disk-space-dev-vda1-is-100-full

ericchen

ls | grep 发货 | tr '\n' '\0' | xargs -0 rm

ericchen

# -*- coding: utf-8 -*-
from scrapy.item import Item, Field

class RamenStyle(Item):
    shop_id = Field()
    style = Field()
    soup = Field()

class RamenReview(Item):
    review_id = Field()

ericchen

##Download chrome plugin cookietxt-export and export cookie data to cookie.txt after you login manually##

agent = Mechanize.new

agent.cookie_jar.load('cookies.txt', :cookiestxt)

ericchen

###方法1： 可以将远端的github代码下到本地来修改，无须再自己fork一个新的项目，便于快速修改plugin中的错误， 下面是使用方法

Bundler also allows you to work against a git repository locally instead of using the remote version. This can be achieved by setting up a local override:

bundle config local.GEM_NAME /path/to/local/git/repository (bundle config local.active_shipping ~/gems/active_shipping/)

and setup the git repo pointing to a branch: gem 'active_utils', :github => 'Shopify/active_utils', :branch => '2.2.3'

##推荐使用方法2, 将github的源码copy到vendor下，然后在gemfile里面指定一下path##

ericchen

How to install PhantomJS on Ubuntu

Version: 1.9.7

Platform: x86_64

First, install or update to the latest system software.

sudo apt-get update

ericchen

##casperjs

• http://www.andykelk.net/tech/web-scraping-with-casperjs

ericchen

比较2个文件内容的不同行数

sort file1 file2 | uniq -u > file3

查找文件中的重复行

cat file | sort | uniq -d

ericchen

问题描述

使用redirect_to跳转时子域名丢失，比如跳转到subdomain.example.com/admins/users时nginx会帮你解析到subdomain.example.com/admins/.example.com/admins/users

解决方法

在nginx配置文件里面添加如下代码

proxy_redirect off;