Finally, it’s an overview of the switch case in shell scripting. So far we have discussed what is switch case, its syntax, how it works, its flow using a flow diagram and example, different examples to show use cases of switch case statement in shell scripting. I hope after reading th...
...case条件语句我们常用于实现系统服务启动脚本等场景,case条件语句也相当于if条件语句多分支结构,多个选择,case看起来更规范和易读 #case条件语句的语法格式 case "变量" in...read读取用户输入的数据,然后使用case条件语句进行判断,根据用户输入的值执行相关的操作 #执行效果 [root@shell scripts]# sh num.sh ...
/bin/bash#filename=clearPS3="What ××× do you want?"IFS="|"vpn="IPsec ×××|SSL ×××|PPTP ×××|Quit"software="libreswan openvpn pptp"selecttypein$vpndocase$REPLYin1|2|3)echo"You selected$type,please install\"$(echo$software|cut-d' '-f$REPLY)\".";;*)exit;;esacdone ...
Linux shell while循环语句 for :明确循环次数 while :不确定循环换次数 while循环 (1) while CONDITION;do statement statement <改变循环条件真假的语句> done 编写脚本,计算1--100的和 编写while... HAL库ORE问题导致串口接收中断问题解决思路记录 一、问题描述 38400波特率下,1位起始位,1位停止位,无校验位,...
What is the shell?The shell is a special program used as an interface between the user and the heart of the UNIX operating system, a program called the kernel, as shown in Figure 1.1. The kernel is loaded into memory at boot time and manages the system until shutdown. It creates and ...
from Chapter 13 / Lesson 28 2.6K This lesson will cover Bash scripting in the bash shell. The Bash shell is the standard for Linux operating systems. Sample scripts are provided; introductory tasks as well as some more complicated examples are explained in detail. Related to...
MySQL CASE函数是MySQL流程控制函数的一种，上面两种语法分别对应两种不同的方式：第一种语法返回第一个...
Moreover,casestatements can be useful for handling complex condition logic inshell scripts: create amenu-driven program that enables users to choose from different options and sub-options validate user input and perform different actions based on the input format or value ...
Scripting and programming frequently involve the task of comparing strings, which also applies to theBashshell. In certain scenarios like when validating user names or comparing email addresses, performing case-insensitive string comparison becomes necessary. ...
shell中的case语句: 可以把变量的内容与多个模板进⾏匹配,再根据成功匹配的模板去决定应该执⾏哪部分代码。 使⽤格式: case 匹配母板 in 模板1 [ | 模板2 ] … ) 语句组 ;; 模板3 [ | 模板4 ] … ) 语句组 ;; esac case语句的匹配是从上往下地匹配顺序。因此,case语句编写的原则是从上往下,模...