Linux

I. Description of requirementsThe live data in DB2 is aggregated into the summary table by day and hour.Ii. process and steps　　The first step : Write the DB2 stored procedure.1. Create a new SQL editor in Dbvisualizer.2. Code:1--/2CREATE

Translated from: http://blog.chinaunix.net/uid-27105712-id-3270102.htmlIn Linux development, there are several things related to performance, technical staff are very concerned about: process, cpu,mem, network io, disk IO. This paper intends to be

1 . Command format:chown [Options] ... Owner [: [Group]] file ...2 . Command function:Change the file owner and group by Chown. You can use the user name and user identification number settings when you change the owner or group of the file.

1. Rmdir-p is used to delete a list of directories, such as Rmdir-p/TMP/TEST/1/2/3 if/tmp/1/2/below in addition to the 3 directory has a 4 directory, 4 directory also has a 5 directory, then whether it can be successfully deleted? Rmdir-p the error

can the cache in Linux memory really be recycled? Do you really know the free command of Linux?In Linux systems, we often use the free command to view the state of the system's memory usage. On a RHEL6 system, the display of the free command is

When you copy a folder on a Linux system, you are prompted as follows:Shell: cp:omitting directory ' foldera/' Where Foldera is the name of the folder I want to copy, the reason for this warning is that the directory still exists under the

Extending regular ExpressionsExtended Regular Expression command: EgrepRegular expressions are not supported but fast: fgrepCharacter Matching:.:[]:[^]:Number of matches:*:?:+: Match the characters in front of it at least once{m}: Exact match{M,n}

: http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.htmlDownload statement:wget--no-check-certificate--no-cookies--header "Cookie:oraclelicense=accept-securebackup-cookie"/HTTP/

Original link: http://www.jb51.net/LINUXjishu/88971.htmlDescription: The/home directory contains the data directory, the data directory contains a, B, C, D, e five directories, now to the data directory in addition to the E directory of all

Atitit Linux Get project Run environment version1 . 1. Nginx version 11 . 2. Php version 11 . 3. Mysql version 21 . 4. Redis version 21.1.Nginx version [Email protected] ~]# nginx-vNginx version:nginx/1.6.31.2.Php version 3. Check the PHP

Guide Because of the more hierarchical structure of the network server, it is more complex to solve when the network fails. Let me give you a detailed description of the Linux system may appear in some network problems, such as network card

Linux divides it physical RAM (random access memory) into chucks of memory called pages. Swapping is the process whereby a page of memory was copied to the preconfigured space on the hard disk, called swap space, To free up the that page of memory.

System InformationThe processor architecture of the Arch Display machine (1)UNAME-M Display the processor architecture of the machine (2)Uname-r displaying the kernel version in useDMIDECODE-Q Display hardware system

Configuring a network on a Linux system on a VMware virtual machine The first step is to clarify my purpose: to connect with the virtual machine using the Xshell tool via the local computer. Therefore, I need to do the following steps:1: View the

System Hardening (Local security of the server)1 User account Security2 File system security (configuration of System configuration file security services)Important Data filesMounted File System mountTypes of file permissions rwx suid sgid t-bit

Recently often to login to the server via SSH, each time to enter a command and password is very troublesome, check the data found there are two solutions, one is to create a local key directly to log in, the other is to write a script.Here we

how the job of a computer works http://www.cnblogs.com/zhengwei0712/p/5207299.htmljob Two how the operating system works http://www.cnblogs.com/zhengwei0712/p/5234622.htmljob three Linux kernel boot process http://www.cnblogs.com/zhengwei0712/p/52537

With Touch This command, we can easily modify the date and time of the file, and can also create an empty file. However, it is important to note that even when we copy a file, all properties are copied, but there is no way to copy the CTime property.

[Linux] Linux system (File Operations), linux System File Operations Linux has three file types: common files, directories, and device files.   View files Use the ls command to get ll and view the file list. parameters:-l (list form) and-a

Hadoop getting started Hadoop is a big data application platform that provides support for Big Data Storage (HDFS) and big data operation (Mapreduce). This article first introduces Hadoop-related knowledge, next, we introduced how to install and