[root@localhost shell]# sh case.sh What is your preferred scripting language? 1) bash 2) prel 3) python 4) ruby 5) I do not know ! 5 I do not know! [root@localhost shell]# 实例2 #!/bin/bash echo -n "Do you agree whith this? [yes or no]: " read yn case $yn in [Yy]...
...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 ...
[root@localhost shell]# sh case.sh What is your preferred scripting language? bash prel python ruby I do not know ! 5 I do not know! [root@localhost shell]# 实例2 #!/bin/bash echo -n "Do you agree whith this? [yes or no]: " read yn case $yn in [Yy] | [Yy][Ee][Ss])...
/bin/bash#filename=clearPS3="What ××× do you want?"IFS="|"vpn="IPsec ×××|SSL ×××|PPTP ×××|Quit"software="libreswan openvpn pptp"selecttypein$vpndocase$REPLYin1|2|3)echo"You selected$type,please install\"$(echo$software|cut-d' '-f$REPLY)\".";;*)exit;;esacdone ...
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 ...
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 ...
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 ...
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...
PowerShell: A family of Microsoft task automation and configuration management frameworks consisting of a command-line shell and associated scripting language. 5,628 questions Sign in to follow 0 comments No comments Report a concern I have the same question 0 {count} votes Sign in ...