(转)再谈javascript图片预加载技术

发表于2014-03-24由jgh004

比onload更快获取图片尺寸

文章更新：2011-05-31
lightbox类效果为了让图片居中显示而使用预加载，需要等待完全加载完毕才能显示，体验不佳（如filick相册的全屏效果）。javascript无法获取img文件头数据，真的是这样吗？本文通过一个巧妙的方法让javascript获取它。阅读全文

Table 单元格强制不换行

发表于2014-03-21由jgh004

table{width:100%;}
table td{word-break: keep-all;white-space:nowrap;}

(转) C#如何验证一个PE文件的数字签名是否正确（1）

发表于2013-12-16由jgh004

本文转自 http://www.blogbus.com/softone-logs/105678346.html

作者：Eckel Chung blog地址：http://softone.blogbus.com/ 转载请保留

————————————————————————— 阅读全文

Fiddler 过滤 css,图片等请求url 正则表达式

发表于2013-12-06由jgh004

设置步骤:
1.勾选 Request Headers 中的 Hide if url contains 过滤项
2.贴入下方正则表达式

REGEX:(?insx)/[^?/]*.(css|ico|jpg|png|gif|bmp|wav)(?.*)?$

1	REGEX:(?insx)/[^?/].(css\|ico\|jpg\|png\|gif\|bmp\|wav)(?.)?$

REGEX: 表示启用正则表达式
(?insx) 设置正则解释的规则, 忽略大小写等. 阅读全文

树莓派在 shell 下自动挂载 usb 移动存储设备

发表于2013-08-04由jgh004

新建usb存储脚本

nano /etc/udev/rules.d/10-usbstorage.rules

1	nano /etc/udev/rules.d/10-usbstorage.rules

输入以下内容

KERNEL!="sd*", GOTO="media_by_label_auto_mount_end"
SUBSYSTEM!="block",GOTO="media_by_label_auto_mount_end"
IMPORT{program}="/sbin/blkid -o udev -p %N"
ENV{ID_FS_TYPE}=="", GOTO="media_by_label_auto_mount_end"
ENV{ID_FS_LABEL}!="", ENV{dir_name}="%E{ID_FS_LABEL}"
ENV{ID_FS_LABEL}=="", ENV{dir_name}="Untitled-%k"
ACTION=="add", ENV{mount_options}="relatime,sync"
ACTION=="add", ENV{ID_FS_TYPE}=="vfat", ENV{mount_options}="iocharset=utf8,umask=000"
ACTION=="add", ENV{ID_FS_TYPE}=="ntfs", ENV{mount_options}="iocharset=utf8,umask=000"
ACTION=="add", RUN+="/bin/mkdir -p /media/%E{dir_name}", RUN+="/bin/mount -o $env{mount_options} /dev/%k /media/%E{dir_name}"

ACTION=="remove", ENV{dir_name}!="", RUN+="/bin/umount -l /media/%E{dir_name}", RUN+="/bin/rmdir /media/%E{dir_name}"
LABEL="media_by_label_auto_mount_end"

KERNEL!="sd*", GOTO="media_by_label_auto_mount_end"

SUBSYSTEM!="block",GOTO="media_by_label_auto_mount_end"

IMPORT{program}="/sbin/blkid -o udev -p %N"

ENV{ID_FS_TYPE}=="", GOTO="media_by_label_auto_mount_end"

ENV{ID_FS_LABEL}!="", ENV{dir_name}="%E{ID_FS_LABEL}"

ENV{ID_FS_LABEL}=="", ENV{dir_name}="Untitled-%k"

ACTION=="add", ENV{mount_options}="relatime,sync"

ACTION=="add", ENV{ID_FS_TYPE}=="vfat", ENV{mount_options}="iocharset=utf8,umask=000"

ACTION=="add", ENV{ID_FS_TYPE}=="ntfs", ENV{mount_options}="iocharset=utf8,umask=000"

ACTION=="add", RUN+="/bin/mkdir -p /media/%E{dir_name}", RUN+="/bin/mount -o $env{mount_options} /dev/%k /media/%E{dir_name}"

ACTION=="remove", ENV{dir_name}!="", RUN+="/bin/umount -l /media/%E{dir_name}", RUN+="/bin/rmdir /media/%E{dir_name}"

LABEL="media_by_label_auto_mount_end"

现在可以像在 windows 中热插拨 usb 存储设备了.
发现设置会自动挂载到 /media 目录下. 可自行修改路径, 挂载到其他目录. 阅读全文

Debian Linux shell 高亮显示

发表于2013-08-04由jgh004

编辑登录用户的 ~/.bashrc 文件, 每个用户的 ~ 目录可能不同. 用 echo ~ 即可显示实际目录.

nano ~/.bashrc

1	nano ~/.bashrc

# ~/.bashrc: executed by bash(1) for non-login shells.
# see /usr/share/doc/bash/examples/startup-files (in the package bash-doc)
# for examples

# If not running interactively, don't do anything
[ -z "$PS1" ] && return

# don't put duplicate lines or lines starting with space in the history.
# See bash(1) for more options
HISTCONTROL=ignoreboth

# append to the history file, don't overwrite it
shopt -s histappend

# for setting history length see HISTSIZE and HISTFILESIZE in bash(1)
HISTSIZE=1000
HISTFILESIZE=2000

# check the window size after each command and, if necessary,
# update the values of LINES and COLUMNS.
shopt -s checkwinsize

# If set, the pattern "**" used in a pathname expansion context will
# match all files and zero or more directories and subdirectories.
#shopt -s globstar

# make less more friendly for non-text input files, see lesspipe(1)
#[ -x /usr/bin/lesspipe ] && eval "$(SHELL=/bin/sh lesspipe)"

# set variable identifying the chroot you work in (used in the prompt below)
if [ -z "$debian_chroot" ] && [ -r /etc/debian_chroot ]; then
    debian_chroot=$(cat /etc/debian_chroot)
fi

# set a fancy prompt (non-color, unless we know we "want" color)
case "$TERM" in
    xterm-color) color_prompt=yes;;
esac

# uncomment for a colored prompt, if the terminal has the capability; turned
# off by default to not distract the user: the focus in a terminal window
# should be on the output of commands, not on the prompt
force_color_prompt=yes

if [ -n "$force_color_prompt" ]; then
    if [ -x /usr/bin/tput ] && tput setaf 1 >&/dev/null; then
  # We have color support; assume it's compliant with Ecma-48
  # (ISO/IEC-6429). (Lack of such support is extremely rare, and such
  # a case would tend to support setf rather than setaf.)
  color_prompt=yes
    else
  color_prompt=
    fi
fi

if [ "$color_prompt" = yes ]; then
    PS1='${debian_chroot:+($debian_chroot)}[�33[01;32m]u@h[�33[00m] [�33[01;34m]w $[$
else
    PS1='${debian_chroot:+($debian_chroot)}u@h:w$ '
fi
unset color_prompt force_color_prompt

# If this is an xterm set the title to user@host:dir
case "$TERM" in
xterm*|rxvt*)
    PS1="[e]0;${debian_chroot:+($debian_chroot)}u@h: wa]$PS1"
    ;;
*)
    ;;
esac

# enable color support of ls and also add handy aliases
if [ -x /usr/bin/dircolors ]; then
    test -r ~/.dircolors && eval "$(dircolors -b ~/.dircolors)" || eval "$(dircolors -b)"
    alias ls='ls --color=auto'
    #alias dir='dir --color=auto'
    #alias vdir='vdir --color=auto'

    alias grep='grep --color=auto'
    alias fgrep='fgrep --color=auto'
    alias egrep='egrep --color=auto'
fi

# some more ls aliases
#alias ll='ls -l'
#alias la='ls -A'
#alias l='ls -CF'

# Alias definitions.
# You may want to put all your additions into a separate file like
# ~/.bash_aliases, instead of adding them here directly.
# See /usr/share/doc/bash-doc/examples in the bash-doc package.

if [ -f ~/.bash_aliases ]; then

if [ -f ~/.bash_aliases ]; then
    . ~/.bash_aliases
fi

# enable programmable completion features (you don't need to enable
# this, if it's already enabled in /etc/bash.bashrc and /etc/profile
# sources /etc/bash.bashrc).
if [ -f /etc/bash_completion ] && ! shopt -oq posix; then
    . /etc/bash_completion
fi

100

101

102

103

104

105

# ~/.bashrc: executed by bash(1) for non-login shells.

# see /usr/share/doc/bash/examples/startup-files (in the package bash-doc)

# for examples

# If not running interactively, don't do anything

[ -z "$PS1" ] && return

# don't put duplicate lines or lines starting with space in the history.

# See bash(1) for more options

HISTCONTROL=ignoreboth

# append to the history file, don't overwrite it

shopt -s histappend

# for setting history length see HISTSIZE and HISTFILESIZE in bash(1)

HISTSIZE=1000

HISTFILESIZE=2000

# check the window size after each command and, if necessary,

# update the values of LINES and COLUMNS.

shopt -s checkwinsize

# If set, the pattern "**" used in a pathname expansion context will

# match all files and zero or more directories and subdirectories.

#shopt -s globstar

# make less more friendly for non-text input files, see lesspipe(1)

#[ -x /usr/bin/lesspipe ] && eval "$(SHELL=/bin/sh lesspipe)"

# set variable identifying the chroot you work in (used in the prompt below)

if [ -z "$debian_chroot" ] && [ -r /etc/debian_chroot ]; then

debian_chroot=$(cat /etc/debian_chroot)

# set a fancy prompt (non-color, unless we know we "want" color)

case "$TERM" in

xterm-color) color_prompt=yes;;

esac

# uncomment for a colored prompt, if the terminal has the capability; turned

# off by default to not distract the user: the focus in a terminal window

# should be on the output of commands, not on the prompt

force_color_prompt=yes

if [ -n "$force_color_prompt" ]; then

if [ -x /usr/bin/tput ] && tput setaf 1 >&/dev/null; then

# We have color support; assume it's compliant with Ecma-48

# (ISO/IEC-6429). (Lack of such support is extremely rare, and such

# a case would tend to support setf rather than setaf.)

color_prompt=yes

else

color_prompt=

if [ "$color_prompt" = yes ]; then

PS1='${debian_chroot:+($debian_chroot)}[33[01;32m]u@h[33[00m] [33[01;34m]w $[$

else

PS1='${debian_chroot:+($debian_chroot)}u@h:w$ '

unset color_prompt force_color_prompt

# If this is an xterm set the title to user@host:dir

case "$TERM" in

xterm*|rxvt*)

PS1="[e]0;${debian_chroot:+($debian_chroot)}u@h: wa]$PS1"

;;

esac

# enable color support of ls and also add handy aliases

if [ -x /usr/bin/dircolors ]; then

test -r ~/.dircolors && eval "$(dircolors -b ~/.dircolors)" || eval "$(dircolors -b)"

alias ls='ls --color=auto'

#alias dir='dir --color=auto'

#alias vdir='vdir --color=auto'

alias grep='grep --color=auto'

alias fgrep='fgrep --color=auto'

alias egrep='egrep --color=auto'

# some more ls aliases

#alias ll='ls -l'

#alias la='ls -A'

#alias l='ls -CF'

# Alias definitions.

# You may want to put all your additions into a separate file like

# ~/.bash_aliases, instead of adding them here directly.

# See /usr/share/doc/bash-doc/examples in the bash-doc package.

if [ -f ~/.bash_aliases ]; then

. ~/.bash_aliases

# enable programmable completion features (you don't need to enable

# this, if it's already enabled in /etc/bash.bashrc and /etc/profile

# sources /etc/bash.bashrc).

if [ -f /etc/bash_completion ] && ! shopt -oq posix; then

. /etc/bash_completion

再编辑 ~/.profile 文件

nano ~/.profile

1	nano ~/.profile

# ~/.profile: executed by the command interpreter for login shells.
# This file is not read by bash(1), if ~/.bash_profile or ~/.bash_login
# exists.
# see /usr/share/doc/bash/examples/startup-files for examples.
# the files are located in the bash-doc package.

# the default umask is set in /etc/profile; for setting the umask
# for ssh logins, install and configure the libpam-umask package.
#umask 022

# if running bash
if [ -n "$BASH_VERSION" ]; then
    # include .bashrc if it exists
    if [ -f "$HOME/.bashrc" ]; then
        . "$HOME/.bashrc"
    fi
fi

# set PATH so it includes user's private bin if it exists
if [ -d "$HOME/bin" ] ; then
    PATH="$HOME/bin:$PATH"
fi

# ~/.profile: executed by the command interpreter for login shells.

# This file is not read by bash(1), if ~/.bash_profile or ~/.bash_login

# exists.

# see /usr/share/doc/bash/examples/startup-files for examples.

# the files are located in the bash-doc package.

# the default umask is set in /etc/profile; for setting the umask

# for ssh logins, install and configure the libpam-umask package.

#umask 022

# if running bash

if [ -n "$BASH_VERSION" ]; then

# include .bashrc if it exists

if [ -f "$HOME/.bashrc" ]; then

. "$HOME/.bashrc"

# set PATH so it includes user's private bin if it exists

if [ -d "$HOME/bin" ] ; then

PATH="$HOME/bin:$PATH"

然后重新加载 .bashrc 即可.

source .bashrc

1	source .bashrc

具体的内容可 google 查询阅读全文

Linux VPS 性能测试工具 UnixBench 脚本

发表于2013-07-05由jgh004

将下面这段保存为 test.sh , 并输入 ./test.sh 即可自动下载安装 UnixBench 进行性能测试.

mkdir -p ~/unixbench;
cd ~/unixbench;

yum -y install perl-Time-HiRes wget make gcc gcc-c gcc-c++ autoconf time;

wget http://byte-unixbench.googlecode.com/files/unixbench-5.1.2.tar.gz;
tar zxvf unixbench-5.1.2.tar.gz;
cd unixbench-5.1.2;

sed -i "s/GRAPHIC_TESTS = defined/#GRAPHIC_TESTS = defined/g" ./Makefile
make;
./Run;

echo '';
echo '';
echo '';

echo "======= Copy and paste your results to the VPSMARK ======= ";
echo '';
echo 'http://blog.itnmg.net/';
echo '';
echo '';

mkdir -p ~/unixbench;

cd ~/unixbench;

yum -y install perl-Time-HiRes wget make gcc gcc-c gcc-c++ autoconf time;

wget http://byte-unixbench.googlecode.com/files/unixbench-5.1.2.tar.gz;

tar zxvf unixbench-5.1.2.tar.gz;

cd unixbench-5.1.2;

sed -i "s/GRAPHIC_TESTS = defined/#GRAPHIC_TESTS = defined/g" ./Makefile

make;

./Run;

echo '';

echo "======= Copy and paste your results to the VPSMARK ======= ";

echo '';

echo 'http://blog.itnmg.net/';

echo '';

CentOS 安装 phpMyAdmin

发表于2013-07-05由jgh004

安装 phpMyAdmin

如果已经将PHP更新到5.2.x，可以自行安装phpMyAdmin最新版3.x。
phpMyAdmin是一款MySQL数据库web化的管理工具。

yum install phpMyAdmin

1	yum install phpMyAdmin

现在我们配置下phpMyAdmin。我们改下Apache的配置文件，使的phpMyAdmin不单单是本机访问。如下所示:

vi /etc/httpd/conf.d/phpMyAdmin.conf

1	vi /etc/httpd/conf.d/phpMyAdmin.conf

注释或删除本地ip限制. 如下

<Directory /usr/share/phpMyAdmin/>
   <IfModule mod_authz_core.c>
     # Apache 2.4
     <RequireAny>
       #Require ip 127.0.0.1
       Require ip ::1
     </RequireAny>
   </IfModule>
   <IfModule !mod_authz_core.c>
     # Apache 2.2
     Order Deny,Allow
     Deny from All
     Allow from All
     Allow from ::1
   </IfModule>
</Directory>

<Directory /usr/share/phpMyAdmin/setup/> //这一段是web配置工具的访问权限,如果不使用,可以不修改.
   <IfModule mod_authz_core.c>
     # Apache 2.4
     <RequireAny>
       #Require ip 127.0.0.1
       Require ip ::1
     </RequireAny>
   </IfModule>
   <IfModule !mod_authz_core.c>
     # Apache 2.2
     Order Deny,Allow
     Deny from All
     Allow from All
     Allow from ::1
   </IfModule>
</Directory>

# Apache 2.4

#Require ip 127.0.0.1

Require ip ::1

</RequireAny>

</IfModule>

# Apache 2.2

Order Deny,Allow

Deny from All

Allow from All

Allow from ::1

</IfModule>

</Directory>

<Directory /usr/share/phpMyAdmin/setup/> //这一段是web配置工具的访问权限,如果不使用,可以不修改.

# Apache 2.4

#Require ip 127.0.0.1

Require ip ::1

</RequireAny>

</IfModule>

# Apache 2.2

Order Deny,Allow

Deny from All

Allow from All

Allow from ::1

</IfModule>

</Directory>

然后修改里面的配置文件：

vi /usr/share/phpMyAdmin/config.inc.php

1	vi /usr/share/phpMyAdmin/config.inc.php

$cfg['blowfish_secret'] = ‘ ‘ //单引号里面随便填一个字符串。
$cfg['Servers'][$i]['auth_type'] = 'cookie'; //这里使用 cookie 作为验证方式.

1 2	$cfg['blowfish_secret'] = ‘ ‘ //单引号里面随便填一个字符串。 $cfg['Servers'][$i]['auth_type'] = 'cookie'; //这里使用 cookie 作为验证方式.

重启Apache:

service httpd restart

1	service httpd restart

然后,你就可以通过 http://domain.com/phpmyadmin/ 访问phpMyAdmin了。阅读全文

CentOS 安装 VSFTP

发表于2013-07-05由jgh004

配置 FTP 服务

1.安装 vsFTP

yum install vsftpd

1	yum install vsftpd

编辑配置文件

vi /etc/vsftpd/vsftpd.conf

1	vi /etc/vsftpd/vsftpd.conf

我们这里使用虚拟用户的形式, 配置如下.

anonymous_enable=NO
local_enable=YES
write_enable=YES
local_umask=022
dirmessage_enable=YES
xferlog_enable=YES
xferlog_file=/var/log/vsftpd.log
connect_from_port_20=YES
ftpd_banner=Welcome to My FTP Server ^_^.
chroot_local_user=YES
ls_recurse_enable=YES
listen=YES

pam_service_name=vsftpd
userlist_enable=NO
tcp_wrappers=YES

one_process_model=no

#以下是手动添加的
pasv_min_port=30000
pasv_max_port=35000

allow_writable_root=YES
guest_enable=YES
guest_username=root
virtual_use_local_privs=YES
user_config_dir=/etc/vsftpd/user_conf

anonymous_enable=NO

local_enable=YES

write_enable=YES

local_umask=022

dirmessage_enable=YES

xferlog_enable=YES

xferlog_file=/var/log/vsftpd.log

connect_from_port_20=YES

ftpd_banner=Welcome to My FTP Server ^_^.

chroot_local_user=YES

ls_recurse_enable=YES

listen=YES

pam_service_name=vsftpd

userlist_enable=NO

tcp_wrappers=YES

one_process_model=no

#以下是手动添加的

pasv_min_port=30000

pasv_max_port=35000

allow_writable_root=YES

guest_enable=YES

guest_username=root

virtual_use_local_privs=YES

user_config_dir=/etc/vsftpd/user_conf

2.生成vsftpd虚拟用户数据库文件：

建立虚拟用户名单文件：

vi /etc/vsftpd/ftpuser.txt

1	vi /etc/vsftpd/ftpuser.txt

内容如下：

ftp1
1234
ftp2
5678

ftp1

1234

ftp2

5678

格式很简单：“一行用户名，一行密码！”。阅读全文

CentOS 安装 Zend Guard Loader

发表于2013-07-05由jgh004

在 Zend 官网上找到 Zend Guard Loader 的下载页, 找到 Linux 版本的 Zend Guard Loader, 点击下载, 需要登录, 登录后会弹出下载提示, 开始下载, 复制实际下载地址, 用 wget 下载.

yum install wget
wget http://downloads.zend.com/guard/6.0.0/ZendGuardLoader-70429-PHP-5.4-linux-glibc23-i386.tar.gz

1 2	yum install wget wget http://downloads.zend.com/guard/6.0.0/ZendGuardLoader-70429-PHP-5.4-linux-glibc23-i386.tar.gz

解压下载的文件

tar zxvf ZendGuardLoader-70429-PHP-5.4-linux-glibc23-i386.tar.gz

1	tar zxvf ZendGuardLoader-70429-PHP-5.4-linux-glibc23-i386.tar.gz

进入 ZendGuardLoader 目录, 查看 README 文档, 按照说明进行安装.

cd ZendGuardLoader-php-5.4-linux-glibc23-i386
cat README.txt

1 2	cd ZendGuardLoader-php-5.4-linux-glibc23-i386 cat README.txt

开始安装
复制 php-5.4.x 文件夹下的 ZendGuardLoader.so 到 /usr/lib/httpd/modules 目录或 /etc/httpd/modules 目录, 这两个目录其实是同一个位置.

cp ZendGuardLoader.so /usr/lib/httpd/modules

1	cp ZendGuardLoader.so /usr/lib/httpd/modules

编辑 php配置文件.

vi /etc/php.ini

1	vi /etc/php.ini

在 php.ini 文件末尾添加几行配置项.

zend_extension=/usr/lib/httpd/modules/ZendGuardLoader.so
zend_loader.enable=1
zend_loader.disable_licensing=0
zend_loader.obfuscation_level_support=3

zend_extension=/usr/lib/httpd/modules/ZendGuardLoader.so

zend_loader.enable=1

zend_loader.disable_licensing=0

zend_loader.obfuscation_level_support=3

重启 Apache 或 Nginx

service httpd restart

service nginx restart
service php-fpm restart

service httpd restart

service nginx restart

service php-fpm restart

用浏览器打开 phpinfo.php 页面, 在 php 项最下面看到如图所示即完装成功. 阅读全文

IT农民工

又一码农的一亩三分地

(转)再谈javascript图片预加载技术

比onload更快获取图片尺寸

Table 单元格强制不换行

(转) C#如何验证一个PE文件的数字签名是否正确（1）

Fiddler 过滤 css,图片等请求url 正则表达式

树莓派在 shell 下自动挂载 usb 移动存储设备

Debian Linux shell 高亮显示

Linux VPS 性能测试工具 UnixBench 脚本

CentOS 安装 phpMyAdmin

安装 phpMyAdmin

CentOS 安装 VSFTP

配置 FTP 服务

1.安装 vsFTP

2.生成vsftpd虚拟用户数据库文件：

CentOS 安装 Zend Guard Loader