/bin/bash # forloop.sh: Count from 1 to 9 for (( COUNTER=1; COUNTER<10; COUNTER++ )) ; do printf “The counter is now %d/n” “$COUNTER” done exit 0 当循环开始时,执行双括号中的第一个表达式,每次循环开始执行第三个表达式,并检查第二个表达式,当
One can use the for loop statement even within a shell script. While the For Loop is a prime statement in many programming languages, we will focus on how to use it for the bash language. Are you ready to add yet another tool to your developer arsenal? Let’s explore deeper into the...
For example, you can run UNIX command or task 5 times or read and process list of files using a for loop. A for loop can be used at a shell prompt or within a shell script itself. for loop syntax Numeric ranges for syntax is as follows: forVARIABLEin12345.. Ndocommand1 command2 co...
bash for 循环使用方法export export命令将会使得被 export 的变量在运行的脚本(或shell)的所有的子...
是一种在Linux命令行中执行循环操作的方法。Bash是一种常用的Unix shell和命令语言,用于编写和执行脚本。 在bash中,可以使用嵌套的for循环来实现对多个变量或数据集合的迭代处理。以...
For example, you can run UNIX command or task 5 times or read and process list of files using a for loop. A for loop can be used at a shell prompt or within a shell script itself. for loop syntax Numeric ranges for syntax is as follows: ...
/bin/bashforiinfile{1..3};doforxinweb{0..3};doecho"Copying$ito server$x"scp$i$xdonedone When you save and execute this script, the result is the same as running the nested loop example above, but it's more readable, plus it's easier to change and maintain....
fruit=orange; and on the third and final iteration,fruit=pear. Once it has completed the loop, the script continues normal execution with the next command after thedonestatement. In this case, it ends by saying “Let’s make a salad!” to show that it has ended the loop, but not the...
Linux Bash Script loop shell 编程之流程控制 for 循环、while 循环和 until 循环 for var in item1 item2 ... itemN do command1 command2 ... commandN done 1. 2. 3. 4. 5. 6. 7. for var in item1 item2 ... itemN; do command1; command2… done; ...
1. 创建脚本文件:使用文本编辑器(如vi或nano)创建一个新的文件,例如script.sh。确保文件拓展名为.sh。 2. 添加shebang行:在脚本文件的第一行添加shebang行,指示脚本用哪个shell来运行。常用的是#!/bin/bash。 3. 添加命令:在脚本文件中添加要执行的Linux命令。每个命令占一行,并且可以使用任何Linux命令、参数...