Shell

Execute the shell script with Jenkins and execute a command:2Tips:[ADB] $/bin/sh-xe/users/xxxxx/tools/apache-tomcat-8.5.30/temp/jenkins8525959692743554347.sh+ adb shell input KeyEvent 26/users/xxxxx/tools/apache-tomcat-8.5.30/temp/jenkins852595969274

1. ExercisesFind all files with the suffix. txt in the/123 directory Bulk Modify. txt to. txt.bak Package all. bak files into 123.tar.gz The name of the batch restore file, that is, to remove the added. Bak again 2. Exercise

Hell Command Application Exercise ①/ETC/PASSWD 'ETC/PASSWD contains a row for each user account, containing seven fields separated by a colon (":"): Login name, selected encrypted password, Word user ID, Word Group ID, username and comment

First, Shell introductionIi. History of the OrderHistorical command Store path/root/.bash_history, default can hold 1000 commands#history//View specific history commands[[email protected] ~]# echo $HISTSIZE//system built-in environment

[TOC]Shell Programming (ii) One, the logical judgment in Shell Script 1.1 judgment Statement if1.1.1 format 1:if 判断语句；then commandfiExample 1# vim if01.sh //判断数值大小第一种方法用[]，注意前后空格#!/bin/basha=5if [ $a -gt 3 ]then echo

In the use of Linux system, we often need to perform some operational analysis of the file, such as sorting the text, to remove weight, to intercept some of the rules of the field. Cut,sort,uniq is easy to use.1.sort: Generally there are three modes,

20.5 logical judgments in shell scriptsLogical ExpressionsIn the [] bracket:-lt:=little than less than-le:=little && equal less than equals-eq:=equal equals-ne:=no Equal Not equal to-gt:=greater than greater than-ge:=greater && equal greater than or

8.10 Shell Special Symbol Cut command : Represents any arbitrary character？ : Represents any single character#: Denotes comment characters\ denotes a de-semantic character| Represents a pipe characterThe Cut command is used to intercept a

Contact Linux in the sophomore time, then fascinated by the embedded Linux, the computer replaced with Linux system, learning the basic knowledge of Linux, learning Linux commands, learning shell, bubble forum, so slowly the normal work of learning

In the shell script, the variable definition, the reference each has the different way, in addition, very commonly has the file attribute judgment, the logical operation, the numerical operation and so on, the following record their attribute

变量：命名的内存空间 数据存储方式： 字符： 数值：整型，浮点型 变量：变量类型 作用： 1、数据存储格式 2、参与的运算 3、表示的数据范围 类型： 字符 数值：整型、浮点型 强类型：变量不经过强制转换，它永远是这个数据类型，不允许隐式的类型转换。 一般定义变量时必须指定类型、参与运算必须符合类型要求； 调用未声明 变量会产生错误 如 java,c# 弱类型：语言的运行时会隐式做数据类型转换。无须指定类型， 默认均为字符型；参与运算会自动进行隐式类型转换； 变量无须事先定义可直接调用

1. In most cases, UNIX system commands accept input from your terminal and send the resulting output back to your terminalThe list of REDIRECT commands is as follows:2. Output redirection: Redirects are generally implemented by inserting specific

Break and continue can all be used in the loop, but the two functions are a bit different, for example, break is jumping out of the loop, while continue is jumping out of the loop and going on to the next loop, we'll show the difference between the

#!/bin/bash#定义软件包变量tnginx= "Nginx-1.6.0.tar.gz"nginx= "nginx-1.6.0"Tcmake= "Cmake-2.8.6.tar.gz"Cmake= "cmake-2.8.6"tlibmcrypt= "Libmcrypt-2.5.8.tar.gz"libmcrypt= "libmcrypt-2.5.8"tmcrypt= "Mcrypt-2.6.8.tar.gz"mcrypt= "mcrypt-2.6.8"Tmhash= "Mhash-0.9.

Shell string ProcessingGet string length ${#var}var="www.baidu.com"echo ${#var}13String Slice ${var:index:length}, ${var:index} index starting from 0echo ${var:2} //从下标为2开始，一直截取到结束w.baidu.comecho ${var:3:8} //从下标为3开始截取8个字符.baidu.cecho ${var:(-5)}

one, pipe and operation controlCat 1.txt |wc-l; Cat 1.txt |grep ' aaa 'Enter the result of the preceding command to the following commandCTRL Z pauses a task, the task is hidden in the background, and the FG can be used to lift the task to the

1.1 String test operatorThe string test operator has the function of comparing whether two strings are the same, whether the length of a string is zero, whether the string is null (NOTE: Bash distinguishes between 0-length strings and empty strings,

Break:Berak statements are usually used in loop statements and switch statements, and when the break statement is used in a do-while, for, and while Loop statement, the program terminates the statement following the loop. Usually the break

1. String length:Var=123abc456echo ${#var}9expr length $var 92. Specify character interceptionEcho ${var:5} #截取前五个字符c456echo ${var:2:5} #截取第2到第5个字符3abc4echo ${var: 3} 3 characters after intercept (with space on the left) 4563. Interception of

A few days ago, a classmate in the group to raise an egg problem, the original question is as follows:There was a basket of eggs,One 1, just take it out.2, 2, take it, just finish it.3, 3, take it, just finish it.4 of 4, 2 left.5 of 5, 4 left.6, 6,