/bin/bash#filename=what-lang-do-you-like_menu_select.shclearPS3="What is your preferred scripting language?"selectsinbashperl python ruby'(quit)'docase$sinbash|perl|python|ruby)echo"You selected$s.";;'(quit)')break;;*)echo"You selected error,retry...";;esacdone 1. 2. 3. 4. 5....
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...
shell的基本语句(for循环,while循环,嵌套循环,if 的多重循环,case语句) 1.for循环(遍历) 练习1:检测当前172.25.254网段主机的状态 练习2:写一个10秒的倒计时 练习3:写一个用户自定义分秒的倒计时 2.while循环 练习1:批量创建用户,并非交互式修改用户密码 3.嵌套循环 练习:打印9*9乘法表 4.if-else 循环 ...
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. ...
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...
Bashis a powerful and versatilescripting languagethat can be used to automate tasks, manipulate data, and perform complex operations. One feature that makes Bash so flexible is the ability to useconditional statements: if elif else case In particular,we use these conditional statements to control ...
Linux系统中的shell编程——case语句和函数 Linux系统中的shell编程——case语句和函数 一.case语句 1.工作原理: case语句为多重匹配语句,如果匹配成功,执行相匹配的命令 语法结构: 2.应用实例 (1)服务状态管理 需求: 当给程序传入start、stop、restart三个不同参数时分别执行相应命令 ......
Bash 101 Hacks, by Ramesh Natarajan. I spend most of my time on Linux environment. So, naturally I’m a huge fan of Bash command line and shell scripting. 15 years back, when I was working on different flavors of *nix, I used to write lot of code on C shell and Korn shell. Late...
General :: Change Case Of A String (BASH Scripting)? Jul 9, 2010 Is there any inbuilt functionality in Unix shell script so that i can able to convert lower case string input to an upper case? I dont want to use high level languages like java,python or perl for doing...