Mysqldump命令errno:24的解决
经常是用mysqldump命令备份mysql数据库，突然遇到这个问题，解决之
njava@njava:~/sql$ mysqldump -unjava -pnjava --default-character-set=gbk njava>njava.sql mysqldump: Got error: 1016: Can't open file: './njava/db_xxyou.frm' (errno: 24) when using LOCK TABLES
是用参数
--lock-tables=false
来解决这个问题
njava@njava:~/sql$ mysqldump -unjava -pnjava --default-character-set=gbk --lock-tables=false njava>njava.sql njava@njava:~/sql$
在PHP中使用memcached
由于网站流量逐渐增大，而且有个新需求是需要实时更新文章的点击和回复。所以准备上memcached来做一个解决的办法。
在php中使用memcached
1 安装memcached
直接
njava:~ njava$ sudo apt-get install memcached
本地开发使用的是刚升级了的mac10.6.4,使用port安装
njava-MacPro:~ njava$ sudo port install memcached
当然也可以自己编译代码了，为了省事就这样用了
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由于Zend Optimizer的支持把ubuntu10.04下的php5.3降级到php5.2
因为Zend Optimizer 3.3.9都还没有开始支持php5.3，所以把ubuntu10.4的php5.3降级到php5.2
步骤
１ 增加karmic源
njava@njava.com:~$sudo vi /etc/apt/sources.list.d/karmic.list deb http://archive.ubuntu.com/ubuntu/ karmic main restricted universe multiverse deb-src http://archive.ubuntu.com/ubuntu/ karmic main restricted universe multiverse deb http://archive.ubuntu.com/ubuntu/ karmic-updates main restricted universe multiverse deb-src http://archive.ubuntu.com/ubuntu/ karmic-updates main restricted universe multiverse deb http://security.ubuntu.com/ubuntu karmic-security main restricted universe multiverse deb-src http://security.ubuntu.com/ubuntu karmic-security main restricted universe multiverse
在Ubuntu 10.04 下安装Ispcp管理虚拟主机
一时大意，在服务器上装了ubuntu10.04,由于太新了，ispcp最新版本ispCP Omega 1.0.6 • 2010-08-04都不能直接安装，所以从svn check了最新的代码来安装
1. check ispCP
njava@njava.com:~$svn checkout http://www.isp-control.net:800/ispcp_svn/trunk/
2. update相关组件,监测安装脚本, 在ubuntu 10.04下将识别出ubuntu-packages-lucid的脚本
njava@njava.com:~$cd trunk njava@njava.com:~$aptitude update && aptitude safe-upgrade njava@njava.com:~$aptitude install $(cat ./docs/Ubuntu/ubuntu-packages-`lsb_release -cs`)
在PhpStorm中使用Xdebug来调试php断点
用PhpStorm有几个月的时间了，一直没找到一种好的调试断点的方法，今天突然看到这个东西，不错，记录下来
1 从http://code.activestate.com/komodo/remotedebugging/下载mac版本的Komodo-PHPRemoteDebugging-6.0.0-beta3-54627-macosx.tar.gz
2 提取相应php版本的xdebug.so
3 丢到 /usr/local/php5/lib/php/extensions/no-debug-non-zts-20090626/ 下面
4 在 /usr/local/php5/lib/php.ini里添加配置文件
[xdebug] zend_extension=/usr/local/php5/lib/php/extensions/no-debug-non-zts-20090626/xdebug.so xdebug.idekey=PhpStorm1 xdebug.remote_enable=On xdebug.remote_host=localhost xdebug.remote_port=9000 xdebug.remote_handler=dbgp
5 重启apache
6 配置PhpStorm ，ok
在网页上显示淘宝旺旺图标和QQ在线状态图标
将您的淘宝旺旺状态发布在互联网上点击“旺旺图标” ，他人便可随时随地与您联系,买卖宝贝, 广交淘友，”旺遍天下”给您更便捷的淘宝体验。
链接：http://www.taobao.com/help/wangwang/wangwang_0628_04.php
在线生成QQ状态图标
scrapy
Scrapy ，这是一个用 Python 写的 Crawler Framework ，简单轻巧，并且非常方便，并且官网上说已经在实际生产中在使用了，因此并不是一个玩具级别的东西。http://scrapy.org/
Latest stable release: 0.8
The latest stable release is available from several sources:
- Download the source tarball: Scrapy-0.8.tar.gz
- Download the Windows installer: Scrapy-0.8.win32.exe
- Scrapy 0.8 on PyPI
- install with:
easy_install -U Scrapy
- install with:
- Ubuntu PPA for Scrapy 0.8 (maintained by Insophia, the company behind Scrapy)
- after adding PPA, install with:
apt-get install scrapy - the PPA version also includes post-release bug fixes
- after adding PPA, install with:
python爬虫和数据挖掘
考虑用python做爬虫，需要研究学习的python模块
1内置的 urllib, urllib2 库用来爬取数据
2 使用BeautifulSoup做数据清洗
http://www.crummy.com/software/BeautifulSoup/
编码规则
Beautiful Soup tries the following encodings, in order of priority, to turn your document into Unicode:
1 An encoding you pass in as the fromEncoding argument to the soup constructor.
2 An encoding discovered in the document itself: for instance, in an XML declaration or (for HTML documents) an http-equiv META tag. If Beautiful Soup finds this kind of encoding within the document, it parses the document again from the beginning and gives the new encoding a try. The only exception is if you explicitly specified an encoding, and that encoding actually worked: then it will ignore any encoding it finds in the document.
3 An encoding sniffed by looking at the first few bytes of the file. If an encoding is detected at this stage, it will be one of the UTF-* encodings, EBCDIC, or ASCII.
4 An encoding sniffed by the chardet library, if you have it installed.
5 UTF-8
6 Windows-1252
可以用fromEncoding参数来构造BeautifulSoup
soup = BeautifulSoup(euc_jp, fromEncoding="gbk")
3 使用python chardet 字符编码判断
http://chardet.feedparser.org/download/
4 更加强大的 selenium
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