Nested-if-statement-examples-bash-script Case Statement Case 语句类似于 if 语句,但带有多个 elif。bash 脚本中的 Case 语句展开表达式,然后尝试找到与所有模式的匹配。当找到匹配时,将执行所有语句,直到双分号 “;;”。如果没有找到匹配,则将执行 “*)” 模式下提到的语句。 Syntax :
使用chmod +xtest.sh第三步：检测语法错误bash-x abc.sh第四步：执行./exampleshell脚本的执行通常有...
The if in a Bash script is a shell keyword that is used to test conditions based on the exit status of a test command. An exit status of zero, and only zero, is a success, i.e. a condition that is true. Any other exit status is a failure, i.e. a condition that is false. ...
The main advantage of using ‘else if’ in bash scripting is that it allows your scripts to handle multiple conditions, making them more flexible and powerful. However, it’s important to be aware of potential pitfalls. For instance, the order of your conditions matters. The script will execu...
在bash中，变量是一个用来存储数据的实体。每个变量都有一个名称和一个值，名称是变量的 ...
/bin/bash># This script is a value test for 1 and 2>#2016-0828 author chawan>#>if[1-lt2];then>echo"2 is bigger">fi>EOF[root@localhost test]# chmod +x if11[root@localhost test]# ./if112is bigger 1. 2. 3. 4. 5. 6....
问在if语句中使用STDIN的bashENexport export命令将会使得被 export 的变量在运行的脚本(或shell)的...
/bin/bash # This script prints a message about your weight if you give it your # weight in kilos and hight in centimeters. if [ ! $# == 2 ]; then echo "Usage: $0 weight_in_kilos length_in_centimeters" exit fi weight="$1"...
Example of running bash script with logical operators in if statement 🏋️ 练习时间 让我们做一些练习吧 😃 练习1:编写一个 Bash Shell 脚本,检查作为参数提供给它的字符串的长度。如果未提供参数,它将打印 “empty string”。 练习2:编写一个 Shell 脚本来检查给定文件是否存在。你可以提供完整的文件路...
7.1.1.4. 检查shell选项 加入到你的Bash配置文件中去: # These lines will print a message if the noclobber option is set: if [ -o noclobber ] then echo "Your files are protected against accidental overwriting using redirection." fi 环境以上的例子将在命令行输入后开始工作: ...