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

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,

10.1 Commond: Suppress normal shell function lookups 10.2 exec: Replacing the current shell process with the Execute command 10.3 Bash:gnu's Bourne-again shell interpreter 10.4 Builtin: Execute shell built-in command 10.5 Enable:

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

The VI editor has three status modes "VI file name (or path + file name)"1. Command mode2. Input mode3. Last-line modeConversion between three modesVi. start and exit of the VI editorGo directly to the editing environment$ VIEnter the editing

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.

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

DirectoryI. Condition selection: If statementTwo. Conditional judgment: Case statementThree. For loopI. Condition selection: If statement Single Branchif judgment condition; thenBranch code with true conditionFiExample: Judging whether a number

#!/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

Transferred from: http://blog.csdn.net/huanbia/article/details/51318278Problem description When using SECURECRT to open Spark-shell, sometimes the following problems, when the wrong time to press the BACKSPACE (BACKSPACE) or delete (delete key),

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:

Multiple values can be stored in an arrayThe shell array is represented by parentheses, and the elements are separated by a "space" symbol.Syntax format:Array_name= (value1 value2 ... valuen)Defining

Shell script to Implement Bubble Sorting Code tutorial, shell script Bubble Sorting Shell script to Implement Bubble Sorting Code tutorial #! /Bin/bash # capture data read strtemp = "" array = ($ str) # counterfeit bubble for (I = 1; I $ {filename}