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1. Introduction   In Linux, If you download and install an application, it is very likely that the prompt "command not found" appears when you type its name. If you find the executable file in the installation target folder every time, it is too

Step by step, create a crosstoolchain based on ARM + Linux-Linux general technology-Linux programming and kernel information. The following is a detailed description. Disclaimer: This article is based on the reference of online materials, and is

The first two days of being hooked on latex, I think it's convenient to compile a PDF using Batch command.So there was:Type Main.tex | Find "\def\usewhat{dvipspdf}" && goto Dvipspdftype Main.tex | Find "\DEF\USEWHAT{DVIPDFMX}" && goto Dvipdfmxtype

Introduction to PHP Standard Library (SPL) notes SPL is the abbreviation of Standard PHP Library (PHP Standard Library. The Standard PHP Library (SPL) is a collection of interfaces and classes that are meant to solve common problems. According to

Hadoop advanced 1. Configure SSH-free (1) Modify the slaves fileSwitch to master machine, this section is all done in master.Enter the/usr/hadoop/etc/hadoop directory, locate the slaves file, and modify:slave1slave2slave3(2) Sending the public

WinRAR can also manage my desktop for a long time. There are too many things on the desktop. How should I manage it at ordinary times? If you have installed WinRAR, you can ask it for help and use it to clear useless desktop files or icons. Take the

1. GDB: The Flash builder simulates the program running on the client. When the server is suspended in the memory, debugging is required if a request is sent and a module in the program is not running properly, GDB is a good tool. Common commands

When you directly open Adobe Acrobat 7.0 Professional to create a DOC file to PDF, the following error occurs: "Do you want to run the installer in fixed mode when the maker file is lost?", click "yes", and the problem is not solved. But there is no

Dpkg learning:(1) dpkg is a relatively low-level Installation tool. to process the. Deb file, the software package dependency requires a higher-level front-end tool apt; dpkg itself cannot resolve dependencies. Dpkg is the front end of dpkg-Deb. If

IOS iTunes file sharing and iositunes file sharing As we all know, Apple does not allow users to view files, and there is no link between different applications. You can only upload files from your computer to your mobile phone by opening the

Linux environment variable 1. Environment variable is a string containing environment information about the system and the currently logged on user, some software programs use this information to determine where to place files (such as temporary

I am very interested in Linux systems. Common Linux sysfs features Linux itself is the core part of this operating system, that is, the operating system kernel. The kernel is the most basic program for completing operations. It is responsible for

Save the data in the file. vmdk of the virtual machine that cannot be started, and the virtual machine. vmdk FROM: http://blog.csdn.net/npy_lp/article/details/7686583   Almost all software engineers engaged in Linux development have used virtual

Count + Distinct + Group 1. Count Query the number of American students in persons. Db. persons. find ({country: "USA"}). count () 2. Distinct Check the total number of countries in persons. Db. runCommand ({distinct: "persons", key: "country"}).

Many people think that Linux is safer than Windows. However, today, security is even more important. This kind of security still requires the correct configuration of users. This kind of security does not have to be achieved through some specialized

XCode6.0 iOS Certificate-free real machine test method (both MAC and black apple are valid) Currently, iOS programs developed on XCode can only run in Simulator. If you want to test on a real machine, you need an officially authenticated developer

Extundelete linux data recovery tool, extundeletelinux 1. Introduction to extundelete 1. extundelete file recovery tool. The most powerful tool is ext3/ext4 dual-format partition recovery. 2. During the actual online recovery process, do not install

Configure the yum repository and rpm package, and the yum repository rpm Job 1: 1) Add a 15 gb scsi hard disk before enabling Linux.   2) enable the system, right-click the desktop, and open the terminal.   3) It is a newly added hard disk

Set up on EL5 Vsftp is a popular FTP server in various Linux distributions.   Basic software requirements: Tcp_wrappers-7.6-40.4.el5.i386.rpm Vsftpd-2.0.5-12.e15.i386.rpm   The installation configuration is divided into the service

After Ubuntu server is installed, you want to install Oracle10g as the database servers of various systems in the future. The whole process was long and tortuous, and it took a whole day. I. Preparations 1. Download Oracle10g for Linux 2.