Shell

storage engine and transaction concepts Brief:1. What is a storage engine2. What is a transactionfirst, the storage engine the way to store and manage data in layman's words Image examples: A bicycle keeper in a place: Lee, Zhang.

Numeric OperationsNeed to use exprOne=' Expr5 + Ten' echo $one two points Note: there is a space between the expression and the operator, for example2+2Is wrong must be written2 + 2The complete expression is to be ' contained ' note that this

Bash Shell Basic Features II(1) globbingText name wildcard: Meta characters*: matches any character of any length;?: matches any single character;Example: A*b:aab, AB, a123b;A?b:[]: matches any single character within the specified range;Example: [0-

Shell scripting improves Date//view dates and times-S change Time date-s "2015-08-20 14:27:12"View time Date + "%y-%m-%d%h:%m:%s"-D Change Single time Date-d "-2 Days" +%f+%w Show weeks+%w show how many weeks this yearntpdate //Calibration time

Here's what you'll find useful after reading the third chapter of the Linux command line and Shell script programming encyclopedia.1./ETC/PASSWD file　　This file contains a list of all system user accounts and basic configuration information for each

Case: Flow control statements• Loop Statement For...done statement• Use (()) to extend the method of using arithmetic operations in the shell• Looping statement nesting• Jump out of the loop: Break and Continueshift parameter Left SHIFT commandHow

1) Start specifying the script interpreter#!/bin/sh; #!/bin/bash2) opening plus version and copyright information3) No Chinese comments in script4) file saved with. sh extension5) Full-time write-in of paired content to prevent leakage6) [] have

Ftp-v-d-i-n-g [host name], where-V Displays all the response information for the remote server;-N Limit FTP automatic login, that is, do not use;. n etrc file;-d use debug mode;-G cancels the global file name.http://blog.itpub.net/20943428/viewspace-

Input command hbase Shell entersTo view all tables that exist:ListTo view the table structure:Describe ' table name 'Query the contents of the table:Scan ' TABLENAME '-----For example have a student table to view it scan ' student 'Add, update data :

Using Nginx as a load balancer, proxy Web server, the user requested data points to the Nginx load balancer, Nginx is responsible for scheduling the backend Web server to provide services.Environment Construction and Description:Nginx Load Balancer

First, Introduction1. Variable type:User-defined variables (local variables)Environment variables: Define each user's operating environment, has learned path,ps1; to be permanent, write to the corresponding locationPre-defined variablesPositional

How to use:Format 1:last-nN Specify the number of accounts, the latest first n login information (user, terminal, IP, date, time and duration)Format 2:last-n Purpose: In daily work, if you want to troubleshoot the most recent years who are or have

The way to compare two strings for equality is:If ["$test" x = "Test" x]; ThenHere are a few key points:1 using a single equals sign2 Note that there is a space on each side of the equal sign: This is the UNIX shell requirement3 Notice the last X of

Download the following log and copy and paste it into your Linux, and then perform a statistical analysis:650) this.width=650; "src=" http://www.apelearn.com/bbs/static/image/filetype/unknown.gif "border=" 0 "class=" VM " Style=

Replacing a row of records in a property file with a shell scriptAssume a subordinate file demo.propertiesUser.name=testuser.password=123456...............................Requirements: First, you need to replace the value values of User.Name and

#!/bin/shCurl=$1Crootdir=/data/tomcat/tomcat-usercenterShrootdir=/data/tomcat/dll#delete old versionRM-RF $shRootDir/usercenter-web.war*#默认war包地址为jenkins上最后一次打包成功的urlif [$cURL =

1. Real-time view of the shell types used in the current process: recommendedThe code is as follows:PS | grep $$ | awk ' {print $4} '(Note: $$ indicates the shell's process number)2. The most common command to view the shell, but cannot reflect the

Definition of 0x00 ArrayThe definition group of arrays has its place as a special data structure in any programming language, and of course the Bash shell is no exception. This article makes a small summary of the shell array. Here we only discuss

Installing Redis Services and PHP Redis extensions One, redis related file downloadSecond, Redis installation iii. Phpredis expansion and installation I. Downloads of documents related to this document1, Redis:http://redis.io/download2. PHP redis

Batch deployment of application system shell scripts (Tomcat/jetty) and tomcatjetty on linux servers Shell script for batch deployment of application systems on linux servers: 1. Replace the server address in the Code (Tomcat or jetty