Linux

For complex Linux drivers and libraries such as HAL, you need to debug them using a variety of methods. For example, set breakpoints, step-tracking code, output debug values, and so on. Although there is no visual Studio, Delphi, Eclipse in the

About the free-m interpretation in LinuxExecuting free-m at the command lineThere are some related information (unit of measure (M)), of course, the memory of each machine is different and will varyTotal used free shared buffers CachedMEM:1002 769 23

awk usage:Awk-f parameter usage: Specify delimiterMy Source documents:More Domain.logHttp://www.baidu.com/index.htmlHttp://www.google.com/1.htmlHttp://www.baidu.com/1.html[[email protected] ~]# awk-f "/" ' {print $} '

Print Kernel debug Information:PRINTK, the function and theprintffunction is similar, exceptPRINTKfunction runs in kernel space,printfThe function runs in user space. PRINTKthe prototype of the function is as follows:asmlinkage int printk (const

The tenth chapter debugging technology of Embedded LinuxInLinuxFile System,/proc/proc /dev) similar. /proc is the virtual file system, that is, /proc Not a real filesystem, but a memory map. All read-write /proc/proc file system is much faster than

While usingPRINTKthe function can easily write messages to the log file or to the console. But a lot of usePRINTKOperations log files or console files with frequent functions can severely affectLinuxDrive development performance. Therefore, this

How to debug: Set breakpoints, step through code, and output debugging information.Print Nehe Debug information: PRINTK. The PRINTK function runs in kernel space, and the PRINTK function runs in user space. Linux kernel programs such as Linux

I. Environmental description1. Operating system kernel version:2.6.9-78.ELSMP2.keepalived software version:keepalived-1.1.20.tar.gzSecond, the Environment configuration1, the primary keepalived server IP address 192.168.111.2232, Standby keepalived

Brief introduction of two load modes of Linux shared libraryDynamic library technology typically reduces the size of the program, saves space, improves efficiency, and is highly flexible, and is easier to upgrade software versions. Unlike static

System environment:Centos-6.5-web system upgrade: Yum-y UpdateSystem permissions: Root Administrator InstallationYum-y Install Subversion New directory store SVN all filesMkdir/svn Create a new Resource warehouseSvnadmin Create/svn/project

Operating system centOS7 installation Nginx:1. If the compiler is not installed in centOS7, install the GCC compilation module firstYum install gcc gcc-c++ ncurses-devel perl2, install Nginx dependency package:Yum Install pcre-devel zlib zlib-devel3,

First, RAID introductionRAIDAn inexpensive redundant disk array (redundant Array of inexpensive Disks), fromLinux 2.4kernel start,Linuxsoftware is availableRAID, you don't have to buy expensive hardwareRAIDcontrollers and accessories (typically

Memcached is installed on the virtual machine, local access is possible, but the memcached application that connects the machine from other machines always reports a connection failure. The ports on the firewall are open. Google only to know that

Eoiioe Linux under the extract command Daquan. tarUnpacking: Tar xvf Filename.tarPackage: Tar cvf filename.tar DirName(Note: Tar is packaged, not compressed!) ）———————————————. gzDecompression 1:gunzip filename.gzDecompression 2:gzip-d

The I/O scheduling subsystem is used to schedule I/O requests from multiple processes to block devices.Elevator Dispatch First, if a request for an adjacent disk sector operation already exists in the queue, the new request is merged into a

1.WindowHttpd.exe [-D name] [-D directory] [-f file] [-c "directive"] [-c "directive"] [-W] [-K Start|rest Art|stop|shutdown] [-N service_name] [-K install|config|uninstall] [-N service_name] [-v] [-v] [-h] [ -l] [-l] [-t] [-t] [-S] [-x]options:-D

Mount a USB flash drive to centos7 Run the mount command: mount [-fnrsvw] [-t vfstype] [-o options] device dir Parameters:1.-t specifies the file system type of the device. Common options are described as follows:(1) The earliest File System Used in

Basic CentOS variable commands1. Classification of Variables 1) User-Defined variables2) environment variables: these variables mainly store data related to the operating environment of the system.3) Location Parameter Variable: this variable is

CentOS system recycle bin settings After linux rm deletes a file, it is troublesome to restore it. Even if it is restored, the file name format is changed to a string of numbers. Modify the environment variable of the root user vi ~/.bashrc Comment

HTTP 1.0 & 1.1, http1.0 Introduction: HTTP (HyperText Transfer Protocol) is the most widely used network Protocol on the Internet. HTTP is the standard for client and server requests and responses. The client initiates an HTTP request using a WEB