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class RubyClassInstanceVariableTest
  def self.attr1
    @attr1 = "*att1*"
  end

  def self.test1
    attr1
    puts "Try directly print @attr1: #{@attr1}"
  end

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ImageMagick useage:

convert goblin.png -crop 64x64  -background transparent  player.png

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sudo ifconfig eth0 192.168.11.187 netmask 255.255.0.0

sudo route add default gw 192.168.8.5

add nameserver 192.168.8.5 to file /etc/resolv.conf

cd /media/xubuntu/WD2TB
sudo dd if=/dev/sda of=T420HDD-20150506.img

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# at bottom of environment.rb
ActionMailer::Base.delivery_method = :smtp
ActionMailer::Base.default_content_type = "text/html"
ActionMailer::Base.smtp_settings = {  
 :address => "smtp.126.com",  
 :port => 25,  
 :domain => "www.zhaoonline.com.com",  
 :authentication => :login,  
 :user_name => "boy.365@126.com",  
 :password => "xxxxxxxx",  

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We couldn’t find that file to show.

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#!/bin/sh  
   
 case "$1" in   
   start)           
     /usr/local/lighttpd/sbin/lighttpd -f /etc/lighttpd/lighttpd.conf > /dev/null 2>&1  
     ;;  
  stop)   
     killall lighttpd  
    ;;  
   restart)   

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# in app/models/ 
class NoisyImage  
   require 'RMagick'  
   include Magick  
   
   attr_reader :code, :code_image  
   
   def initialize(length = 4)  
     text_size = 20
     validbglinecolors = ['#FFF', '#FFF', '#FFF', '#FFF', '#FFF']

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# 关于oracle plsql developer

imp file=xxx fromuser=xxx touser=xxx

sqlplus "/as sysdba" 
startup

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<?PHP
    // First off, how many items per page?
    $per_page = 4;

    // Next, get the total number of items in the database
    $num_videos = $db->getValue("SELECT COUNT(*) FROM videos where status = 'approved' ORDER BY dt");

    // Initialize the Pager object
    $pager = new Pager($_GET['p'], $per_page, $num_videos);

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--搜索关键字的记录

CREATE OR REPLACE PROCEDURE P_NEWKEYWORD(
	p_keyword VARCHAR
)IS
	v_keyword_id number;
	v_now date:=sysdate;
BEGIN
	BEGIN
		SELECT ID INTO v_keyword_id FROM KEYWORDS WHERE keyword=p_keyword AND ROWNUM=1;