Linux

1. Mkdir/soft (Create a directory to store the installation software)2, cd/soft (switch to soft directory)3, RZ (select Install package from Windows)4. RMP-IVH jdk-7u45-linux-x64.rpm (Install JDK)5. Find/-name ' JDK '6, Vi/etc/profile (edit

1, download the image ISO file 2, download the corresponding Boot.iso cd Boot file 3, download Ultraliso software 4, write Boot.iso file into U disk 5, copy the image file into U disk 6, install the first installation, no attention to the

The role of device driversThe operation of any computer system is the result of the combination of hardware and software, and the computer system's hardware and software accomplish each other.Application software engineers need to see a pure

Linux servers require time accuracy, but Linux itself does not have the network time synchronization function, we need to use the Ntpdate function to achieve accurate time.Installing NtpdateYum-y Install Ntpdatedomestic commonly used NTP server list

1----------------------------------------------------------------------------------------------View Catalog: Ls-a or Ls-rView Log file: Cat file name. log--------------------------------------------------------------------------How to view partial

1 "Linux Program Design" Foundation is very important 2 "UNIX environment Advanced Programming" Or the Basics , if you're doing application programming in a unix/linux environment, then look at3, "Linux kernel design and implementation"This book

Under Linux, you can use the following tools to query the CPU cache:Mode 1:$ lscpuL1D cache: 32K (First level data cache) l1i cache: 32K (First order cache) L2 cache: 256K (Level two cache) L3 cache:

Dynamic library generation and use under LinuxI. Basic concepts of dynamic libraries1. The dynamic link library is the library that is loaded when the program runs, and when the dynamic link library is installed correctly, all programs can

When you manage Umount devices in Linux, you often encounter "device is busy" if umount a file system encounters this situation, and you are not in the directory you want to uninstall. Then there is likely to be a user or process using that

When applying unix/linux, we usually want to let a program run in the background, so we will often use & at the end of the program to let the program run automatically. For example we want to run MySQL in the

Linux shuts down firewall 1. Effective after rebootOpen: Chkconfig iptables onOFF: Chkconfig iptables off 2. Immediate effect, failure after rebootOpen: Service iptables startClose: Service iptables stop 3. When the firewall is turned on, make the

/bin: User command Directory (command file directory that can be executed by all users)/dev: Computer equipment directory (all files on Linux, devices on the computer are displayed as files in this directory, but this is only the entry of the device,

File systemWindowsNtfsFAT32LinuxVFS: Virtual file system: different from the underlying file system, through a unified interface, output to the upper applicationExt2Ext3Ext4XfsFile system: The partition file on the line organization management, and

#/bin/bash#befortime=02:00aftertime=08:00befortime=$ (echo  $beforTime  | awk -F :  {' print $1 '}) aftertime=$ (echo  $afterTime  | awk -f : {' print $1 ') Flag=0while truedo     sleep 2s    echo  "date: $ (date +"%y-%m-%d  %h:%m:%s ")"     if [ $ (

View the running path of a process in linux. In linux, you may think of ps-ef | grep XXX. But what we see is not the full path. How can we see the full path? After each process is started, there is a pid path under/proc. Example: ps-ef | grep

Install and configure KVM virtual machines in CentOS 6.5 Note: KVM can be installed only in 64-bit server versions above RHEL5.5, and Centos is the same. Both the client Version and 32-bit cannot install KVM. Preparations for installation: because

Centos memory CPU Calculation Method CPU usageHere, we need to extract four pieces of data from/proc/stat: user mode, nice mode, and system mode) and idle processor time (idle ). They are located in the first line of the/proc/stat file. The CPU

Linux Advanced Skills: heartbeat + lvs (1)1. Introduction to heartbeat:The Heartbeat project is an integral part of the Linux-HA project, which implements a high-availability cluster system. Heartbeat service and cluster communication are two key

Install and configure KVM on CENTOS 6.5 RHEL6 has been launched for a long time. I didn't expect to have so many problems installing KVM on RedHat's RHEL6. Shouldn't it be enough to install KVM Like Apache/MySQL? (Note: Except for trademarks, CentOS

IP addresses with the most accesses in apache logs Assume that the apache log format is: 118.78.199.98--[09/Jan/2010: 00: 59: 59 + 0800] "GET/Public/Css/index.css HTTP/1.1" 304-"http://www.a.cn/common/index.php”" Mozilla/4.0 (compatible; MSIE 6.0;