Linux

The number of Linux CPUs is judged by/proc/cpuinfo.Same Physical ID: determines a physical processorIf "siblings" and "CPU cores" are consistent, hyper-threading is not supported, or hyper-threading is not open.If "siblings" is twice Times "CPU

Zendchina official: The following describes the installation method for Zend Optimizer 3.3 in a Linux environment. This article is a Linux system based on the RHEL5 architecture.(1) Installation of Zendoptimizer 3.3.3 version.Zendoptimizer

The 1,linux version number indicates:Major.minor.releaseExample: 2.4.4,3.10.182, Distributor:Release version: Open source program +linux kernelSlackwareThen derivative: SuSEDebianThen derivative: UbuntuRedhatThen derivative: Centos (Community

Fourth shell programming I-Getting StartedI. Basic concepts of shell scriptsA shell script is an executable plain text file that consists of multiple shell commands.Execution of commands from top to bottom, left to right analysis and

Construction of Embedded Linux development environment (IV.)--samba Server constructionLinux systems: Ubuntu Server 12.04The installation process is as follows: 1. Installation sudo apt-get install samba Samba-common 2. Modify the configuration file

Examples of find common usages in LinuxFind Path-option [-print] [-exec-ok command] {} \;Parameters for the Find commandThe directory path that the Path:find command looks for, for example, to represent the current directory, and/to represent the

Several CPUsMore/proc/cpuinfo |grep "Physical ID" |uniq|wc-lEach CPU is a few cores (assuming the same CPU configuration)More/proc/cpuinfo |grep "Physical id" |grep "0" |wc-lCat/proc/cpuinfo | grep processor1. View the number of physical

EmbeddedLinux Bare Metal Development (14)--ADC First,Introduction to AD conversion ad conversions are analog -to-digital conversions , is to convert analog signals into digital signals. A/D converters are used to convert analog quantities into

Linux kernel socket optimizerVi/etc/sysctl.confNet.core.netdev_max_backlog = 30000 The maximum number of packets that are allowed to be sent to the queue when the rate at which each network interface receives packets is faster than the rate at which

Summary of operations that connect and interact with remote environmentsFirst class: Enter the command mode directly in the Linux environment1) FTP [email protected] #回车之后需要输入密码Or: FTP Remoteip #回车后提示输入用户名和密码2) sftp sftp=ssh+ftpUsage: Login In the

Centos6.5 install the virtual image environment Xvfb and chrome Xvfb is a display server that implements the X11 display service protocol. Unlike other display servers, Xvfb performs all graphic operations in the memory, No display device is

Popular with Docker-first KnowledgeGuideWith the explosion of distributed, cloud computing, and big data, a large number of cloud computing clusters have emerged, and the computer hardware alone cannot compete with each other. Virtualization has

CentOS 6.7 Add all methods for permanent static routes When using a dual-nic and two gateways at the same time, you need to add a static route. Of course there are still many times that you need to add routes. Operating system version centos-6.4

Check 12 Performance Tuning commands in linuxGuidePerformance Tuning is one of the most important tasks for O & M engineers. If your production environment experiences slow system response speed, abnormal hard disk I/O throughput, and the data

Disable IPV6 network in CentOS 6.7 IPV6 is enabled when the system is installed, but IPV6 is not required in actual use, so you need to disable it. The following is my solution. At the beginning, I also stepped on a lot of pitfalls. I read a lot of

Ss Command exampleGuideSs is short for Socket Statistics and can be used to obtain socket Statistics. It can display content similar to netstat. But the advantage of ss is that it can display more detailed information about TCP and connection status,

CentOS7 access content in the CD-ROM When using the operating system, we sometimes use optical disks and optical drives. Unlike windows's access to the content of a CD, if you want to access the CD in CentOS7, You need to attach the CD to a local

Common commands for yum installation and uninstall software 1. Use yum to install and uninstall software. The premise is that the software packages installed by yum are in rpm format. The installation command is: yuminstall ~, Yum queries the

How to install CentOS 7 in Win10 Recently, I tried to learn Linux, so I bought a book from laruence according to my suggestions on the Internet. For later learning convenience, prepare to install CentOS7. After preparing the image file and USB flash

Zabbix Monitoring System Usage Details Zabbix is an enterprise-level open-source solution that provides distributed system monitoring and network monitoring functions based on the WEB interface. It consists of zabbix server and the optional