Linux

LVS Features:1. Strong anti-load capability, using IP load Balancing technology, only to do distribution, so LVS itself does not have much traffic generated;2. Stable, reliable, self-perfect hot-standby program; (eg: lvs+keepalived)3. A wide range

System# uname-a #查看内核/operating system/CPU information# head-n 1/etc/issue #查看操作系统版本# Cat/proc/cpuinfo #查看CPU信息# hostname #查看计算机名# Lspci-tv #列出所有PCI设备# Lsusb-tv #列出所有USB设备# Lsmod #列出加载的内核模块# env #查看环境变量Resources# free-m #查看内存使用量和交换区使用量# df-h

Transferred from: http://www.cnblogs.com/wang_yb/p/3514730.htmlAfter reading the book, it turned out that the first note was issued in August 2012, and nearly 1.5 of the time to read the book (Khan!!!).To facilitate later viewing, make a directory

Soft linksSoft Connect: Ln-s source File Destination fileExample: ln-s/etc/issue/tmp/issue.soft creating a soft linkLn/etc/issue/tmp/issue.hard Creating a hard linkSoft Connection Features1, lrwxrwxrwxSoft connection file permissions are rwxrwxrwx2,

1, how to achieve high concurrency of nginx?After the service Nginx start, and then enter #ps-ef|grep Nginx, you will find Nginx has a master process and several worker processes, these worker processes are equal, are the master fork. In master,

Jmap can view the heap memory usage of Java programs, Pmap can view memory usage of processes running on Linux.To view memory usage for processes running on Linux, you can use the Jmap,top,ps command.The top command itself is also relatively

in the previous section, we deployed Tomcat service, you can see that this service is really easy to deploy, but only if you want to learn the basics of the previous command. Today, I plan to give you a little bit more on the basis of the last

A long time ago to modify the Linux system network card operating mode command is Mii-tools, and later with the development of computer server hardware, has already entered the era of 1000Mbps popularization, now the large server is basically

Linux Development Tools I. GCC primer (top) 1.GCC related concepts gcc (GNU c Compiler) compiler, originally supported in C language, now supports C, C + +, Java,Pascal, Ada, COBOL language, etc. support a variety of hardware platforms;GCC is more

Disk-related knowledge: 1, the hard disk has several platters, each disc two faces each has a head 2, the disc is divided into multiple sectors 3. Concentric circle with different radius of the same disc as the track 4, the same

Welcome everyone to my blog, first of all declare this article is my * * *, if the text is inappropriate, but also please the predecessors of the great God a lot of advice, niche here first thanked. Life always has all kinds of unhappy, for me the

[Email protected]:/home/wuheng# ls-lTotal 44Drwxr-xr-x 2 Wuheng Wuheng 4096 Mar 3 01:30 DesktopDrwxr-xr-x 2 Wuheng Wuheng 4096 Mar 3 01:30 DocumentsDrwxr-xr-x 2 Wuheng Wuheng 4096 Mar 3 01:30 Downloads-rw-r--r--1 Wuheng Wuheng 8980 Mar 3 09:23

[email protected] ~]$ cat/proc/versionLinux version 2.6.32-279.el6.x86_64 ([email protected]) (GCC version 4.4.6 20120305 (Red Hat 4.4.6-4) (gcc)) #1 SMP Wed J Un 18:24:36 EDT 2012[email protected] ~]$ uname-aLinux rheltest1.com 2.6.32-279.el6.x86_64

----------------------------------the Cd/pwd/ls command to use the-------------------------------CD: Used to switch directoriesRoot directory: CD/Home directory: cd ~Previous level directory: CD.Current directory: CD.PWD: View absolute pathLS: View

First, the basic conceptA file system is an endogenous software that manages the files stored on a storage device.Only the kernel can interact with the hardware's storage devices. The kernel also does not start when the operating system is not

Cat/proc/sys/kernel/msgmax Maximum message length limit cat/proc/sys/kernel/msgmnb The total number of bytes in Message Queuing Cat/proc/sys/kernel/msgmni Number of message entriesMessage Queuing synthesis caseServer#include #include #include

C language connection mysql -- insert code implementation, C language mysqlinsert // Mysql_insert// Gcc mysql_insert.c-o test-I/usr/include/mysql-L/usr/lib-lmysqlclient # Include # Include # Include # Define HOST "localhost"# Define USERNAME

CentOS 6.5 uses Memcached for PHP session. save_handler Php has two memcache modules: php-memcache, php-memcached, and php-memcached, too much information on the internet is about php-memcache, and php-memcached is rarely mentioned. The

Set an alias for SSH to access a remote server Generally, the command to access the remote server using ssh is: ssh username @ IP address, for example: ssh root@112.232.12.12, and then enter the password to access. Take Mac OS as an example. For

Install Solr4.8.0 on Tomcat Solr is a java-based web application. Therefore, JDK and tomcat must be installed before solr is installed. I will omit tomcat and jdk installation. The first step: of course is to download to the official online download