缺少这些库时,安装 : apt-get install php5-gd 就可以.…

网上很多使用的是getProperties.说获得系统变量,但是其实不正确.getProperties中所谓的"system properties"其实是指"java system",而非"operation system",概念完全不同,使用getProperties获得的其实是虚拟机的变量形如: -Djavaxxxx. getenv方法才是真正的获得系统环境变量,比如Path之类.其方法命名方式有违Sun命名规范其实. 意思就是说:希望使用J…

很明显,以下的文字来自微软MSDN 链接http://msdn.microsoft.com/en-us/library/windows/desktop/ms681382(v=vs.85).aspx MSDN上分成了几个部分,查起来费事,统一放在这里了. 用kernel32.dll里的FormatMessage可以得到支持多语言的返回消息 有人把这些错误代码整理成了类,供参考 http://www.cnblogs.com/Sabre/p/3929264.html Note The informat…

http://askubuntu.com/questions/221835/installing-ubuntu-on-a-pre-installed-windows-8-64-bit-system-uefi-supported If you are using Ubuntu 15.04+, many issues are now solved, so there is no need to follow this guide except if you are using any Ubuntu…

通过每块代码进行源码解读,并发现源码使用的技术栈,扩展视野. registerNatives 方法解读 /* register the natives via the static initializer. * * VM will invoke the initializeSystemClass method to complete * the initialization for this class separated from clinit. * Note that to use prop…

CIFS (Common Internet File System) is a protocol that gained popularity around the year 2000, as vendors worked to establish an Internet Protocol-based file-sharing protocol. The Common Internet File System (CIFS) is the standard way that computer us…

The Qt Resource System The Qt resource system is a platform-independent mechanism for storing binary files in the application's executable. This is useful if your application always needs a certain set of files (icons, translation files, etc.) and yo…

转载自:http://blog.csdn.net/dreamxu/article/details/6125545 http://www-900.ibm.com/developerWorks/cn/linux/kernel/l-kerconf/ 上面这篇文章针对的系统相对较老点. 后来又找到了一篇新的文章: http://blog.csdn.net/estate66/archive/2010/09/15/5886816.aspx   因为在2.6.36的内核中,已经没有config.in文件.取而…

A multiprocessor computer system is provided having a multiplicity of sub-systems and a main memory coupled to a system controller. An interconnect module, interconnects the main memory and sub-systems in accordance with interconnect control signals…

SRC=http://www.cs.rutgers.edu/~pxk/416/notes/13-fs-studies.html Paul Krzyzanowski April 24, 2014 Introduction We've studied various approaches to file system design. Now we'll look at some real file systems to explore the approaches that were taken i…

FIELD OF THE INVENTION The present invention is related to computing systems, and more particularly to a system and method for adjusting to changes in processor performance. BACKGROUND INFORMATION Designers of mobile computing platforms are faced wit…

A trusted computer system that offers Linux® compatibility and supports contemporary hardware speeds. It is designed to require no porting of common applications which run on Linux, to be easy to develop for, and to allow the use of a wide variety of…

TLSv1.3 Support:主流 Web 客户端和服务端对 TLSv1.3 的支持情况 请访问原文链接:https://sysin.org/blog/tlsv1-3-support/,查看最新版.原创作品,转载请保留出处. 作者:gc(at)sysin.org,主页:www.sysin.org 2021 年 8 月发布的 Windows Server 2022 正式支持 QUIC 和 TLS 1.3 相关特性.至此,主流产品已经全部支持 TLSv1.3 协议. TLS 1.3 由 IETF…

按照之前的文章讲解,都已经搭建好了,可是在刚开始运行就报错了,代码和报错如下: WebDriver driver = new ChromeDriver(); driver.get("http://www.baidu.com"); 错误如下: Exception in thread "main" java.lang.IllegalStateException: The path to the driver executable must be set by the w…

`configure' configures this package to adapt to many kinds of systems. Usage: ./configure [OPTION]... [VAR=VALUE]... To assign environment variables (e.g., CC, CFLAGS...), specify them as VAR=VALUE. See below for descriptions of some of the useful va…

1.创建文件夹 //using System.IO; Directory.CreateDirectory(%%1);   2.创建文件 //using System.IO; File.Create(%%1);   3.删除文件 //using System.IO; File.Delete(%%1);   4.删除文件夹 //using System.IO; Directory.Delete(%%1);   5.删除一个目录下所有的文件夹 //using System.IO; foreach (s…

Move configuration information out of the application deployment package to a centralized location. This pattern can provide opportunities for easier management and control of configuration data, and for sharing configuration data across applications…

php下载页面 http://cn2.php.net/downloads.php 7.0.3多地区下载页面 http://cn2.php.net/get/php-7.0.3.tar.gz/from/a/mirror 直接下载地址 http://cn2.php.net/distributions/php-7.0.3.tar.gz 下载解压目录 /usr/local/php7.0.3 下载php压缩包    wget http://cn2.php.net/distributions/php-7.0.…

对Oracle数据库整体性能的优化,首先要关注的是在有性能问题时数据库排名前几位等待事件是哪些.Oracle等待事件众多,随着版本的升级,数量还在不断增加,可以通过v$event_name查到当前数据库版本包含的等待事件.例如我在Linux平台查11.2.0.4版本的Oracle是有1367个等待事件.SELECT name FROM V$EVENT_NAME ORDER BY name; 如此多的等待事件自然是要分类汇总,并对常见的等待事件有比较深入的认识,才能在Oracle数据库调优这条路上…

import org.apache.commons.beanutils.BeanUtils; import org.apache.commons.collections.CollectionUtils; import org.apache.commons.collections.MapUtils; import org.apache.commons.lang.ArrayUtils; import org.slf4j.Logger; import org.slf4j.LoggerFactory;…

读取本地外网IP地址. 根据启动并运行的网卡名称,找到本机实际的IP地址(已知当前运行的无线网卡名包含某一个字符) import java.net.InterfaceAddress; import java.net.NetworkInterface; import java.net.SocketException; import java.util.Enumeration; import java.util.Iterator; import java.util.List; public clas…

编译安装php参考资料 MySQL PHP API http://dev.mysql.com/doc/apis-php/en/index.html nginx + php +mysql 最简单安装 官方介绍 http://php.net/manual/zh/install.unix.nginx.php php下载地址: http://cn2.php.net/distributions/php-5.6.7.tar.gz 编译php环境需要的包 autoconf: 2.13+(PHP < 5.4.0…

有人把SystemErrorCodes整理成了类,并定义了方法,用于返回消息,他大概不知道FormatMessage的用法,放在这里做参考吧 C# code snipppet class SystemErrorCodes{ public const Int32 ERROR_ACCESS_DENIED = 5; public const Int32 ERROR_ADAP_HDW_ERR = 57; public const Int32 ERROR_ALREADY_ASSIGNED = 85; pu…

alipay 的几个内核功能文件:======================================================================================================AlipayFunction.java package com.test.util.alipay; import java.io.FileWriter; import java.io.IOException; import java.net.MalformedU…

http://blogs.msdn.com/b/ntdebugging/archive/2010/04/14/understanding-pte-part2-flags-and-large-pages.aspx Hello, it's Ryan Mangipano with part two of my PTE series. Today I'll discuss PDE/PTE flags, the TLB, and show you a manual conversion of x86 PA…

实用命令实例   1. 列出所有端口 (包括监听和未监听的)   列出所有端口 netstat -a # netstat -a | more Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 localhost:30037 *:* LISTEN udp 0 0 *:bootpc *:* Active UNIX d…

Total Commander 8.52 Beta 1http://www.ghisler.com/852_b1.php 10.08.15 Release Total Commander 8.52 beta 1 (32/64) 05.08.15 Fixed: Windows 10: Loading drive buttonbar hanging on some devices (e.g. Surface Pro 3) when SD-Card was in internal card reade…

内核:                linux-3.0 uboot:             2010.09 开发板:             fl2440 交叉编译器:         2011.11 1.对根文件系统进行修改 无修改 2.添加内核对jffs2的支持 [weishusheng@localhost linux-3.0-jffs2]$ vt100[weishusheng@localhost linux-3.0-jffs2]$ sudo make menuconfig File s…

引言 对于系统和网络管理员来说每天监控和调试Linux系统的性能问题是一项繁重的工作.这些命令行工具可以在各种Linux系统下使用,可以用于监控和查找产生性能问题的原因.这个命令行工具列表提供了足够的工具,您可以挑选适用于您的监控场景的工具. 1. lsof - 列出打开的文件 在许多Linux或者类Unix系统里都有lsof命令,它常用于以列表的形式显示所有打开的文件和进程.打开的文件包括磁盘文件.网络套接字.管道.设备和进程.使用这条命令的主要情形之一就是在无法挂载磁盘和显示正在使用或者打开…

uname -r bash-4.1# uname -r2.6.32-431.el6.x86_64 ---- http://repository.it4i.cz/mirrors/repoforge/redhat/el6/en/x86_64/rpmforge/RPMS/ (https://github.com/repoforge/rpms/issues/375 http://repository.it4i.cz/mirrors/repoforge/, ) http://www.cnblogs.com…