Linux

Introduction:When you use the ls-l filename command in Linux to view the properties of the filename, 9 Properties of the file are listed, for example: Ls-l/etc/fstab-rw-r--r--1 root root 1102 2013-10-12 02:33/etc/fstabfrom left to right are the

Socket connectionsSocket is a communication machine, with this mechanism, the client/server system development work can be carried out on the local stand-alone, can also boast network. The creation and use of sockets differs from the pipeline

The default yum update source of CentOS is obtained from the image list. The system automatically detects a fast update source based on your speed and region and uses this update source. If CentOS is in China but foreign sources are used, or the

As the company's application demand increases, the number of servers is also increasing. As the number of servers increases, we will find that a puppetmaster is under great pressure and resolution is slow, in addition, there may be errors such as

Operating System: CentOS6.3 Linux can be controlled by using SSH remote connection, or the following command can be executed on the host for projection. [root@localhost ~]# export DISPLAY=ipaddress:0[root@localhost ~]# xhost + This command requires

More and more people are getting started with Linux operating systems, from VPS to flash machine systems for wireless routing (such as OpenWRT and Tomato ), at the same time, the words "Average system Load" or "Load Average" will also be seen on a

How to send mail via command line in linux 1. The simplest method: Mail-s text ** @ mail.ustc.edu.cn The result of this command is to send an empty email with the title text to the mailbox, but such emails are often treated as spam emails, If

I believe many people are tired of reading the color of Linux Command Prompt which has become unchanged. Most people either use the default green or set it to green when using PUTTY, I don't know if someone thinks that the prompt can be set to

IntroductionFor small and medium-sized enterprises or websites that choose linux as the application platform, they often face the problem of how to implement remote data backup or website image. Although there are commercial backup and image

How to change Linux folder Permissions To learn more about file attributes, In the shell environment, enter ls-l to view the current directory file. For example: Drwxr-xr-x 2 nsf users 1024 12-10 download file backup They correspond: File Attribute

How to view computer hardware device properties in linux# Uname-a # view kernel/OS/CPU information # head-n 1/etc/issue # view OS version # cat/proc/cpuinfo # view CPU information # hostname # view computer name # lspci-TV # list all PCI devices #

[Introduction] Domain Name Server ). Domain names and IP addresses on the Internet correspond one by one. Although domain names are easy to remember, machines can only know each other's IP addresses. The conversion between them is called domain name

Dump backup Restore Dd Data Backup Create a mkisofs Image File Dump backup Dump is mainly used to back up a real file system backup. Although it can also back up a single directory, it does not provide sufficient support for the directory. We

I. Introduction What is LAMP?LAMP is a Web application and development environment. It is short for Linux, Apache, MySQL, Php/Perl. Each letter represents a component, each component is a very powerful component represented by it.The term LAMP first

Original Author:Old boy linux O & M training institution old boy QQ: 31333741Note: A few months ago, the old boy sent a similar article. This time, I have improved my website architecture to participate in an activity invited by a

Recently, HAproxy + keepalived + mysql was used to test the high-availability Linux system cluster.HAProxy is a free proxy software that provides high availability, load balancing, and TCP (Layer 4) and HTTP (Layer 7) applications, with HAProxy, you

Because our company's servers use dell (our company is a mobile game, and all servers are dell), the server models include r410, r420, r710, and r720, the system includes centos 5.x, centos 6.x, redhat 5.x, redhat 6.x, ubuntu 12.04, and ubuntu 12.04.

In Linux, dual-nic binding is achieved by virtualizing two NICs into one Nic. In other words, two NICs have the same IP address, and parallel links are aggregated into one logical link. In fact, this technology already exists in Sun and Cisco, known

Load Balancing is built on the existing network structure, it provides a cheap, effective, and transparent method to expand the bandwidth of network devices and servers, increase throughput, enhance network data processing capabilities, and improve

1) Introduction Flume is a distributed, reliable, and highly available system for aggregating massive logs. It supports customization of various data senders in the system for data collection. Flume also provides simple data processing, and write