Shell

Classification of regular Expressions:1. Basic Regular Expressions (basic Regular expression also known as basic RegEx abbreviation Bres)2. Extended Regular Expressions (Extended Regular expression also known as Extended RegEx abbreviation Eres),

I. Three ways to take random numbers and encrypt them1.random of Fetch and encryptionThe method of taking the number:650) this.width=650; "src=" Https://s3.51cto.com/oss/201711/14/dba3bd986bd100e199cecf8a1067e559.png "title=" Screenshot from 2017-11-

Meaning of the "one" shell: First, the Shell's English meaning is "shell"; It is relative to the kernel, because it is based on the kernel, a representation of the user, for example, we see a ball, see its shell, not nuclear. The shell in

Start, close HBase./bin/start-hbase.sh./bin/stop-hbase.shQuery the HBase version. Its syntax is as follows:HBase (main):010:0> versionBuild tableCreate ' ', ' 'Create ' emp ', ' personal data ', ' professional data 'List all tables: ListTable

One, Shell scriptScript: Can execute the file, after running can implement some function (command stack, non-interactive)Standardize the general composition of shell scripts#! Environmental Statement (Sha-bang)# comment TextExecutable codeSecond,

Optimized scripts for automatic backup, automatic restart of Tomcat#!/bin/bashnew_war= "Mobile.war" project_name= "tomcat-app1" #创建临时文件夹tempDirName = ' date ' +%y%m%d%h%m%s ' tempdirname= "Bak/mobile-${tempdirname}" echo "Ready to create Temp folder:

htxk-106 host information phenomenon is as follows:by Zabbix_get commandZabbix_get [7189]: Check access Restrictions in Zabbix agent configurationWorkaround: By viewing Zabbix related files, found in the Usr/local/sbin directory Zabbix_agend file,

1 Specifications for Shell scripts:1 file suffix is. sh2 first line is the command interpreter: #!/bin/bash3 The first line below the comment write script basic information:Script name, function, writing time, author, contact, etc.2 Shell Execution

Today, programmers who don't have Linux do not mean that they are programmers, and not shell programming can say that they are Linux. It sounds like shell programming is a dick, but don't worry, shell programming is really simple.Background

Shell IntroductionThe shell is a command interpreter that provides interaction between the user and the machine, supports specific grammars, such as logical judgments, loops, and each user can have their own specific shellCentOS7 default shell is

determine whether a variable is an integer through expr[email protected] scripts]# cat judge.sh#!/bin/bash############################################################### File Name:judge.sh# version:v1.0# Author:rain Jin# Blog site:http://www.cnblogs.

If Single-format and nested if　conditional expression; then #当条件为真时执行以下语句 command list else #为假时执行以下语句 command List fiif Statements can also be nested using an if condition expression 1;then if condition expression

Previously review:File management, user management, rights Management, Bash's basic featuresFile Management: CP,MV,RMUser

1. Get nginx log access status code;Grep-ioe "http\/1\. [1|0]\ "[[: Blank:]][0-9]{3}" Nginx_app.api.zhaoyifen.ssl.logGrep-ioe "http\/1\. [1|0]\ "[[: Blank:]][0-9]{3}" Nginx_app.api.zhaoyifen.ssl.log |awk-f "[]+" ' {if ($2>=100&&$2=200&&$2=300&&$2=400

Vmware Tools works with shell scripts to automatically shut down the ESXI6.0 processPrerequisites: Each virtual server in the ESXi host needs to install the VMware Tools tool and use it with the script, otherwise it will not be able to shut down

Enterprise Actual combat Problem 8: How to implement the MySQL database for sub-library backup, please use the script to implementMy script

#!/bin/shdomain= ' echo $1|awk-f '. " ' {print $ '. $ "." $ "."} ' ' Start_ip= ' echo $1|awk-f "." ' {print $4} ' end_ip= ' echo $2|awk-f '. " ' {print $4} ' echo ' domain is $domain ' function Scan () { ping-c 1 $1$2 >/dev/null && echo "$ is

Knowledge Points: Array function Local Variables Defining pass-through parameters Example 1:A= (1 2 3) b= (a B c) function () {Local a=$1 local b=$2 for I in $a does echo $i done Ech o $b}funcition "${a[*]}" "${b[*]}" Result: 12

Defining arraysArray name = (value 1 value 2 ...) Value N)[Email protected] ~]# array_name= (value1 value2 value3 value4)Reading an array${array name [subscript]}[Email protected] ~]# Echo"${array_name}"Value1[[email protected]-r3-srv ~]#

Task required: When I need to compress the files in a folder separately:The original code:1 #!/usr/bin/shell2 function Getdir () {3 forElementinch' LS $`4 Do5 #Echo $element6Dir_or_file=$1$element7 8 #Echo $dir _or_file9