Linux

Brief introductionSAR is a performance tool under Linux that can observe information such as CPU, memory, IO, run queue, context switch per second, and so on.Software Tools Installation#Ubuntu sudo Install sysstat# CentOS Yum Install -ivh sysstat-10

Lab Software Environment: virtual machine VMware Workstation10.0, CentOS 6.5 32-bit1. Get IP address automaticallyVirtual machines use bridging mode, which is equivalent to a network connected to a physical machine, and the physical machine network

preprocessing, compiling, linking, and formatting of the target file how did the program get out of it?In C, for example, C code is pre-processed by the compiler, compiled into assembly code, compiled by the assembler into the target code, and then

How to understand a strange command? Some commands can be used to understand the situation of a command itself, such as the absolute path of the command.$which lsWhich searches for a command in the default path , returning the absolute path to the

Linux SSH service is always open, easy to be invaded by others, want to manage this service, you have to change the following this bold red file[Email protected] ~]# cd/etc/ssh/[[email protected] ssh]# lsModuli ssh_config sshd_config

Seventh airplanes loading of the execution programI. Preprocessing, compiling, linking, and format of the target file 1. How the executable program came in.C Code, preprocessing, assembly code, target code, executable file. ASM Assembly Code. O

Introductiongrep is a powerful text-search command that can be used to search for a file that contains a specified search, it can use regular expressions to do complex filtering, it can also be used to filter other commands to the pipeline, such as

Linux system installation 1, Virtual machine installationVirtualBoxVMware (primary)There is no requirement for VMware installation and the next step is to install it.2. Create a Linux runtime environment1) Create a new virtual machine2) Select a

Linux Interrupt handlersFirst, interrupt processing processEnter ENTRY-ARMV in the Linux kernel code. S directory:　　Linux Unified Portal: __irq svc.After entering the unified portal, the program jumps to the Irq_handler designator (indicated on the

Method One:Nohup Ping www.ibm.com & can change the parent process number of a processMethod Two:Setsid Ping www.ibm.com can change the parent process number of a processMethod Three:(Ping www.ibm.com &) To change the process's parent process

#This script is to parse data file:Fun0 (){##[INFO1]A=1 b=2 c=3[INFO2]A=7 b=8 c=9[INFO3]A=x b=y C=z}#! /bin/bashRead Info ABC#echo $InfoIf ["$Info"! = "INFO1"-a "$Info"! = "INFO2"-a "$Info"! = "INFO3"]Thenecho "Wrong info!"Exit 0FiSed '/^#\|^$/d ' |

First, theoretical knowledgeIn Linux, you can produce an executable program from C source code, which is preprocessed, compiled, and linked. This process can be understood since:Among them, the target file has at least compiled machine instruction

Environment: centos6.5 InstallationCentOS 6.5 is installed by default with SVN server, which is used directly here. If not, use the Yum-y install Subversion installation To create a version library3.1 Creating the SVN root directoryMKDIR/MNT/

To add an FTP user to Linux and set the appropriate permissions, proceed as follows:1, Environment:FTP for VSFTP. The user named Test is restricted. The restricted path is/home/test2, build the User: under the root user:useradd-d/home/test Test//Add

The teacher gave the opportunity to let the students onstage to share the "forgot root password, how to recover password" solution. Carefully prepared a small vacation, although not proficient in Linux principles, but also have their own

Last summary we have burned finish u-boot, I burned U-boot is the board manufacturer custom, this section will use this u-boot burn write the whole system. Of course, when porting a system, it also involves customizing a u-boot.Burn and write the

File filename #查看文件的类型Chmod-r 777 dir/#文件夹, and the files under all change permissionsChown Zhang:zhang dir/#将文件夹更改目录及所属的组which PWD #命令所在的位置Whereis pwdCD ~zhang/# Switch to the user's home directorycd-#切换到上一次用cd的目录Mkdir-p/zhang/z #创建一个文件夹, parent

In the previous article detailing the FTP service (service based on the file Transfer Protocol), this article describes another way to implement this feature, Telnet (telecommunications network remote login) service. This article describes the

Configure pxe to automatically install centos6.7 and pxecentos6.7 Dhcp server is a required condition for automatic installation of pxe. Therefore, you must first set the dhcp server, yum-y install dhcp, and rpm-ql dhcp to check which packages are

How to build a parent-child domain environment? Many companies use a single domain for management at the initial stage. As the company grows, it will have branches in other regions, such as Beijing and Shanghai, in this case, you need to add a new