Shell

First, the meaning of the ADBthe full English name of ADB is Android Debug Bridge, which is Android debugging bridges; theadb executable is stored in the Android SDK, so you will need to download and install the Android SDK tool with the ADB command,

install MAILX, rely on it to send mailyum install mailxEditing a configuration filevim /etc/mail.rc #添加如下内容set [email protected]set smtp=smtp.163.comset [email protected]set smtp-auth-password=xxxset

Case statementcase $变量名 in "值1"） ? 如果变量的值等于值1,则执行程序1 ;; ?"值2"） ? 如果变量的值等于值2,则执行程序2 ;; ? ...省略其他分支... ? *) ? 如果变量的值都不是以上的值,则执行此程序 ;;esac ?//case反过来写"case语句的使用实例"#!/bin/bashread "please input yes /no": chocase "$cho" in "yes") ? ? echo "输入正确！";; ?"no"

VariableA variable is a named memory spaceAll variables in the shell are treated as character variables by default, and bash does not support floating-point variablesNaming rules for variables:You cannot make a reserved word in a program: for

1. ExercisesWrite a script that calculates the size of all processes in the Linux system and2. Exercise Analysis 2.1. First question, where to collect data for a processUse top or PS to get the memory usage size of each process. Once the size is

1, write script/root/bin/systeminfo.sh, display the current host system information, including hostname, IPV4 address, operating system version, kernel version, CPU model, memory size, hard disk size#!/bin/bashecho "hostname: `hostname`"echo "ipv4

Example one: Web server Nginx Script service monitoring[Email protected]/server/scripts] #cat jiance_ng.sh#!/bin/bashif! Ss-lntup|grep [N]ginx &>/dev/nullThen/etc/init.d/nginx startecho "Nginx dead,but It's OK" |mail-s "WHW11" [email

The issue cannot be removed after using HBase shell entry in Xshell:In the HBase shell, the wrong input instructions can not be deleted using backspace and delete, the use of the people know that this is a lot of pits, there is much distress!OK,

Chapter 1th whileLooping Statementsin a programming language , a while loop is a statement of a control flow that uses an expression that returns a Boolean value that, when the return value of the expression is true , repeats the condition of the

Executes the command and uses the command state return value to determine certain statesecho $?0 stands for Success, not 0 for unsuccessfulTo test an expressionNumerical comparison-eq equalsThe return value is 1, indicating 2 is not equal to 3-ne

One, the shell quotes1. "", double quotation marks (do not retain the full content, such as encountered $, anti-quotes, \ etc will execute the corresponding shell)echo "Today is `date`" -> Today is Wed Aug 2. Single quotation mark (full retention

Linux Shell location Variables in detail what are positional variables? Simply put, when the user runs the script, input parameters, the variables corresponding to these parameters are called positional variables.

 Shellscript Common script:ForLoopsWheil Many loops can be replaced with a for loopFor loop syntax structureFor variable name in variable Value listDoinstructionDoneFor ((EXP1;EXP2;EXP3))DoinstructionDoneScript instance:For 99multiplication

Expect script: file name: expect_ssh#!/usr/bin/expectset host [lindex $argv 0]set username [lindex $argv 1]set Password [lindex $argv 2]spawn ssh [email prote CTED] $hostexpect {"(yes/no)?" {send "yes\n" expect "*assword:" {send "$password \ n"}}

Logical operations in shell programming, with or without, short-circuit operations, XOR operations, we use the simplest way to understand the XOR.XOR: ^XOR two values, same as false, different for trueUnderstandably, two values refer to binary

#!/bin/bash#Description: Auto Login The remote server#Author: Majinxu#Version: 1.0#CreateTime: 2018-3-012 18:34:41User= "Majinxu"Passwd= "! Ieric1234 "host_list= ("st1.qa.bj2.yongche.com""St2.qa.bj2.yongche.com""St3.qa.bj2.yongche.com")#seletc the

Before using shell to write scripts, sometimes not only to define a configuration file, often have a template, different environments directly replace the same template content to use, however, until then, has been used in the SED, awk, grep and so

1.1 The following table is a logical operatorTips:！ Inverse: A logical value that is opposite to a logical value.-A Chinese meaning is with (&&): Two logical values are true return values are true, and vice versa is false.-O Chinese meaning yes or

When using Server-side git Hooks a while ago, you need to get git-submitted information, and here's a simple summary of how to get the parameters that git passes.Git 传递参数 标准输入流 passes the submitted information in or out of the form.Get parameter

1.bash supports one-dimensional arrays (multidimensional arrays are not supported) and does not qualify the size of the array(1) define an array:Array_name= (value0 value1 value2 value3)OrArray_name= (Value0Value1value2Value3)or individually defined: