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1, the basic concept (this is the premise of understanding the knowledge behind, it must be understood)A, I/O redirection is usually related to FD, the Shell's FD is usually 10, namely 0~9;b, there are 3 commonly used FD, for0 (stdin, standard input)

I/O redirection details and Application Instances 1. Basic concepts (this is the prerequisite for understanding the following knowledge. please be sure to understand it)A, I/O redirection is usually related to fd, and shell FD is usually 10, that is,

AbstractThere are some old ones, which seem useless now, but they are all famous. 1 Land Attack A Win95 machine. This is a vulnerability in Win95.If you initiate a connection (SYN) on the same port, Win95 will crash. /* Land. c by m3lt, FLCCrashes a

The basic skeleton of the Logrus and log principle (i) in Docker that was analyzed to the container's printout and log function is done in the Entry.log () function, and this Entry.log () also contains two parts: 1) via log Driver the hook function

This article introduces the knowledge of file descriptors and redirection in linux. file descriptors are integers associated with file input and output. they are used to track opened files. For more information, see In linux, the file descriptor is

Combined with the previous collection of v4l2 videos, live555 is used to publish real-time streams through rtsp. capture. h, capture. cpp, vcompress. h, vcompress. cpp should refer to the previous articles. here we only paste v4l2_x264_service.cpp

Inux redirection refers to modifying some of the original default items and changing the default execution mode of the original system commands, for example, if I don't want to see the output on the monitor, but want to output the inux redirection

A recent requirement is to convert a coff file to a burned binary file. There is a good tool, but the command line does not provide parameter input, instead, user input is obtained through interaction, which makes it impossible to automate this step

Original: Http://blog.chinaunix.net/uid-24203478-id-3035890.html   The version used is FFMPEG 0.6.3. Use the compilation command:Gcc-O tutorial01 tutorial01.c-lavutil-lavformat-lavcodec-lswscale The source program is as follows: [CPP] View

NANOMSG Experiment--pubsubThe Publish subscription model is a common feature provided by many message middleware. The message mechanism enables the message publisher and the message to receive (consume) peopleTo decouple. PubSub mode is also one of

Shared memory: A piece of memory reserved by the kernel space for interprocess communicationShared memory is one of the most efficient inter-process communication methods, because the process can read and write memory directly, does not require any

Original: http://blog.chinaunix.net/uid-26000296-id-4461522.htmlIntroduction of Subprocess ModuleThe subprocess was first introduced in version 2.4.The subprocess module is used to generate sub-processes and can be piped to connect their

This article mainly introduces Node. create and manage external processes in js. This article describes how to execute External commands and sub-processes, for more information about how to use Node to efficiently process I/O operations, you should

Introduction to Linux programming-Message Management-Linux general technology-Linux programming and kernel information. For details, see the following. Process Communication (IPC) in Linux) Process Communication (IPC) in Linux) POSIX unknown

Run () method>>> a = Subprocess.run ([' DF ', '-h ']) file system capacity used available% mount point udev 468M 0 468M 0%/ Devtmpfs 98M 7.4M 91M 8%/run/dev/sda1 39G 5.0G 32G 14%/tmpfs

Asynchronously executes exec ("/alidata/server/php/bin/php/nas/wxdoctor/index.php App/common/wordspic/user_id/". $user _info[' user_id ']." /goods_id/". $goods _id. "." /open_id/". $user _info[' open_id '].">/dev/null 2>&1 &"); Discuss the

OSS audio interface programming in Linux-general Linux technology-Linux programming and kernel information. For details, refer to the following section. CODE :/*Name: SndKit. cCopyright: GPLv2Author: rockins (ybc2084@163.com)Date: 15-1

Transplantation of Linux-2.6.32.2 Kernel on mini2440 (18th) --- converting uart2 into a common serial port driver Port Environment (Bold font in redIs the modified content,Blue bold ChineseFor special attention) 1. host environment: centos 5.5 and 1

# Include # Include # Include "hash. H"# Include "Debug. H"# Include "stdio. H"# Include "mytime. H" # Define serv_name "uplsserver" // DWORD winapi run (lpvoid lpparam );DWORD winapi run (char * argv0, char * argv1, char * argv2); // three

/*Name:sndkit.cCopyright:gplv2Author:rockins (ybc2084@163.com)date:15-10-06 18:22Description:implent Raw Sound Record/play Run:./sndkit [H] [D-Device] [-C channel] [-B-bits] [f-Hz] [-L-len] e.g.:./sndkit-h Show Help information./sndkit-r record.wav