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[Reprint]>/dev/null 2> & 1 meaning

Shell may often see: Echo log>/dev/null 2> 1 Command results can be defined in the form of %>/Dev/null: Indicates an empty device file.>: Indicates the redirection location, for example, Echo "123">/home/123.txt1: Indicates stdout standard output. The default value is 1. Therefore, ">/dev/null" is equivalent to "1>/dev

Notepad ++ configure Dev-C ++ Compiler

I. Software Installation I am using Dev-C ++, mainly using its GCC and G ++, notepad ++ 5.6.6 2. Set Dev-C ++ Environment Variables 1. Set the path of the compiler and add D:/dev-CPP/bin to the path of the Windows environment variable. Do not forget to add a semicolon before and remove it from others.2. Set the path of the C Language header file and add c_inclu

Webpack-dev-server Configuration Guide (using webpack3.0)

To configure in Webpack.config.js:Const PATH = require ("path");Module.exports = { entyr:{ .... Set the portal file }, output:{ .... Set export File }, module:{ .... Configure loader, note using rules instead of loaders }, plugins:[... . Note is the array ], devserver:{ //We are here to configure Webpack-dev-server } }The configuration object properties commonly used in Dev

Using EditPlus and Dev C + + to configure the compiled runtime environment for C + +

Perhaps we will have doubts, why not direct use of VC; VS; Dev These ides? Why Shejinqiuyuan. Mainly because the writing program so many years have been accustomed to editplus, including his shortcut keys, grammar automatic completion, grammar hints and so on, editplus with so many years have been very dependent on him, before whether it is written asp;php; Delphi;c#;javascript;html;css and so on are basically used to write. So the main character of t

Win8.1 + Dev C + +

This article wants to explain briefly how to use dev C + + on win8.1.At the beginning of the win8.1, I thought that as long as the 64-bit dev can be installed on the win8.1, but a couple of times, the installation is successful, but each time there will be a problem. Later after Baidu only know, win8.1 and Win7 structure is not the same. Dev that works properly o

The meaning of >/dev/null in shell scripts

In Linux/unix, the information generally seen on the screen is from stdout (standard output) or stderr (standard error Output). Many people will ask, output is output, sent to the screen does not have, why is divided into stdout and stderr it? That is because in the server environment, almost all of the programs are run in background, so, in order to facilitate debug, generally in the design process, the STDOUT sent to/saved to a file, the wrong information stderr saved to different files.Which

Shell's >/dev/null, 2>&1, 2>1

Tags: res translate str data tran flat is rap miniReprinted from: http://dos2unix.cn/link/4801. Standard input stdin file descriptor is 0, standard output stdout file descriptor is 1, standard error stderr file descriptor is 22./dev/null empty equipment, equivalent to garbage bin3. REDIRECT Symbol:>3. The difference between 2>1 and 2>1 2>1, redirect standard error stderr to file 1 2>1, redirect standard error stderr to standard output std

Dev-c++ effect of opening loading force

Dev-c++ is a nice c++ide--10 years ago, it was pretty good, and at the moment, it's an ugly and debugging interface like eating Baba, which is known for two points, such as. It is so ugly that it is too ugly to endure. But there is no way, others CCF rules game with this, you a small konjac konjac noisy what? I'm going to talk about how to make your dev-c++ fast and look like

About the C language compiler dev C + + debugging

Everyone should have installed C language compiler software, but I personally think that Dev C + + is better than VC6.0, so just explain the dev C + + software debugging methodsIf the English is not good, you can first Chinese, and then Debug.Chinese: Tools-----Environment options------BASIC----language----Simplified ChineseThe premise of debugging is to set breakpoints, in

Webpack-dev-server Lightweight JS high-speed packaging, hot deployment server

Webpack is a packaged Web project tool that can implement css,js,less,cass,html encryption, Minify, combined with webpack-dev-server hot deployment, very convenient for front-end page and Nodejs development.WebpackInstallation methodNPM Install Webpack--save-devNPM Install Webpack-dev-server--save-devExecuting webpack requires a configuration file Webpack.config.js in the project directory.varWebpack = requ

Cat/proc/devices and Ls/dev

For beginners, the Linux framework is too large, and many knowledge points need to do their own to understandDevice file, device number #ll-A/dev in each line you can see the device file, device number (primary, secondary)For each hardware device, the system kernel has the appropriate device driver responsible for handling it. In Unix, a device file is used to represent a hardware device, and each device driver is abstracted into the form of a device

Dev-CPP/mingw32/GCC Column

This directory is a sub-file directory introduced by the Language/tool. This section describes the content related to Dev-CPP/mingw32 and GCC. For details, see the link: column of dipper. Http://blog.csdn.net/VisionCat/category/96409.aspx Some problems occurred when I used Lua with Dev CPP today. I would like to record it for future search. Open Dev CPP to cr

[Hooloo] zizaco/entrust 5.2.x-dev Class name must be a valid object or a string,hooloozizaco_php tutorial

[Hooloo] zizaco/entrust 5.2.x-dev Class name must be a valid object or a String,hooloozizaco When using Laravel 5.1 rights Management, use the installation zizaco/entrust 5.2.x-dev when executing PHP artisan entrust:migration When the following error is reported: [Symfony\component\debug\exception\fatalerrorexception]Class name must be a valid object or a string Workaround: The 84th line in the \vendor

Dev-CPP/mingw32 Environment Introduction (4)

Dev-CPP/mingw32 Environment Introduction (4) Review above: The previous introduction to the dev-CPP/mingw32 environment (3) describes the simple methods for debugging programs using GDB. This article will show how mingw32 uses the static Connection Library. Although the release time of this article is indeed a little slow. But I think you should be able to understand. Chapter 7 use static Connection Librar

Ubuntu 14.04.02 LTS startup Item written by mistake/dev/sda1 (win 7 loader) Fix, 14.04.02sda1

Ubuntu 14.04.02 LTS startup Item written by mistake/dev/sda1 (win 7 loader) Fix, 14.04.02sda1 Problem description: Install Ubuntu14.04 in win7. Due to the incorrect startup Item/boot loader installation location (/dev/sda1 (win 7 loader), Windows cannot be accessed (the win7 boot option can be displayed on the GRUB interface, after clicking it, the black screen flashes a few times and returns to the GRUB

Android Udev/dev Device Node permissions

/************************************************************************* * Android udev/dev Device Node Permissions * Note: * Now the Linux System device node permissions are generally through dynamic configuration, has not found the specific * where the configuration of the instructions, this time in the reference books found ueventd.rc is used to do this thing. * 2016-5-14 Shenzhen Nanshan Ping Shan village Zengjianfeng ***************************

Webstorm modify files, Webpack-dev-server and Roadhog do not automatically compile refresh

Transferred from: http://www.cnblogs.com/ssrsblogs/p/6155747.htmlWebstorm was re-installed, upgraded from 10 to 2016.A liter does not matter, open the old project, turn on Webpakc-dev-server, and then change the code, found that the browser will not automatically refresh!!!This is killing me. Various unloading webpack, webpack-dev-server, installation of various versions, debugging. A variety of search data

About the new VUE-CLI installation Json-server The Dev-server file is not generated in the build file

There was a problem installing json-server today, and the build file did not generate a dev-server.js file.Start is suspected configuration has a problem, or is not installed correctly, then reinstalled two or three times, or so, depressed.By querying the information, the new version of the VUE-CLI canceled Dev-server.js and dev-client.js instead of webpack.dev.c

The role of various *-dev or *-devel packs under Linux __linux

1.python-dev or Python-devel Python-dev or python-devel is called the Python development package, which includes information such as the header files that were written with the Python extensions compiled with c/java/c#. For example, when we compile a Python extension module in C language, because there will be such statements as #include 2. Various *.devel Development Kits Linux programming, you will a

PL/SQL Dev remote Connect Oracle

Environment:Win7 64bit Ultimate Oracle 11gRequired Software and:Oracle 64bit ClientHttp://www.oracle.com/technetwork/topics/winx64soft-089540.htmlPL/SQL DEVhttp://www.plsqldev.com/Configuring Tnsnames.ora file Instances#tnsnames. oranetworkconfigurationfile:f:\oracle\product\11.2.0\client_1\network\admin\tnsnames.ora# Generated byOracle configuration Tools. Local named name = (DESCRIPTION = (Address_list = (address = (PROTOCOL = TCP) (host = host IP address) (port = port number)) (Connect_d ATA

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