Linux

A zombie process refers to a parent process that has been "terminated frequently". After the sub-process dead is not accepted by the process, it becomes a zombie process, Note: it refers to the parent progress rather than the child progress.How to

1. Check the compilation options, enter the bin directory, and execute file a. Out to check whether the compilation is 32-bit or 64-bit!   2. Check whether the environment variables are set successfully. You can use the echo command, for example,

We all know that single process and asynchronous Io should be able to achieve optimal communication performance. But in reality, we often find that this model often fails to achieve the expected results. This may be due to the network adapter and

the source region is as follows: # Include # include # include # include # include # definedepth100 # definemyhome "/home/yaodl" # definename "Hangzhou" # definemaxsize8192int main (INT argc, char ** argv) {Inti, size; char * path; if (chdir

The shell in Linux is very powerful, so you can use these commands in the window, there are some ways: 1) install a Linux Virtual Machine 2) cgwin is the most powerful cross-compilation tool, but it is a bit big, with more than 1 GB of data 3)

The IP protocol stack is a major component of the Linux operating system and one of the characteristics of Linux. It is well known for its high efficiency and stability. Netfilter is closely integrated with the IP protocol stack.To understand how

1. PrincipleInt;Int size = 8; 1000 (BIN) Calculate the number of lower bounds of a with a multiple of size:When this number (the number to be calculated) is expressed as binary, the last three digits are 0 to achieve this goal. As long as the

# # Creating files # [Root @ pc f] # cd tmp/testacl[Root @ PC testacl] # ls[Root @ PC testacl] # Touch F1[Root @ PC testacl] # echo "AAA"> F1[Root @ PC testacl] # Cat F1Aaa # # Create a user # [Root @ PC testacl] # useradd usr1[Root @ PC testacl] #

Ok6410 Linux's first driver LED driver // Driver code /*************************************** **************************************** * ********************************** File Name: led_drive.c * Introduction: ok6410 LED driver * Author: different

I. Process Sub-processes for creating, exiting, and sharing spaces, exiting processes, process owner, debugging, And zombie processes; Signal: The operation is interrupted. For example, kill is equivalent to a message in windows. Process

5 ways to search for files using the terminal By PeterOn September 25th, 2008 Http://www.linuxhaxor.net/5-ways-to-search-for-files-using-the-terminal-in-linux/ Editor's note:This is a guest post by an anonymous reader of this blog. who goes by the

1) BIOS self-check 2) Start grub/lilo 3) load the kernel 4) execute the INIT process 5) use the/etc/inittab file for initialization. 6) log on to Linux 1) BIOS self-checkA) post (power on Self Test) to check the hardwareAfter the computer is

First, make sure that you have a system with Linux installed. You can compile the kernel on the local computer, or download the kernel from the Internet to compile it. here we will detail how to upgrade the kernel. You can download the latest kernel

Reprinted connection: http://linux.chinaunix.net/bbs/viewthread.php? Tid = 1044310 & pid = 6813630 & page = 1 & extra = Page % 3d1 # pid6813630 Function Description: chat with other users.Syntax: ytalk [-isxy] [-H] [user name...]Note: You can use

System (execute shell command)Related functionsFork, execve, waitpid, popenHeader file# I nclude Define functionsINT system (const char * string );Function DescriptionSystem () calls fork () to generate sub-processes, which call/bin/sh-CString to

Netfilter is introduced by the 2.4.x kernel. Although it is compatible with ipfw in the 2.0.x kernel and ipchains in the 2.2.x kernel, it is actuallyIt is far more important than this. From the Process Analysis of IP packets, we can see that

Premise: there is not much talk about it, and there is no way to connect with the operator. It is also a talk about too much. How do I import zookeeper? 1. added the-G option to zookeeper. 2. parse the row gdb a. Out (Note: A. out must exist, or

Writing asynchronous I/O models in LinuxIt must be noted that asynchronous I/O and multiplexing synchronous I/O (for example, using the select function to select any completed port in the connection pool) are essentially different, both methods can

The lift () function did not understand why it was working, so I searched again. The following is a brief description of its principles: At any point in time, threads can be combined (joinable) or separated (detached ). A combined thread can be

We have mentioned the development of dynamic and static libraries in Linux. You may have noticed that although our program is still small, however, when a compilation error occurs, we need to do a lot of work to start from the beginning. Sometimes