Example 5: C-style for Loop #!/bin/zshfor((i=1;i<=5;i++))doecho"Number:$i"done Practical Example: Creating Backup Files Create the script file backup.sh: nano backup.sh Add the following content: #!/bin/zshsource_dir="/path/to/source_directory"backup_dir="/path/to/backup_direct...
You can have awhileloop to keep checking for that directory's existence and only write a message while the directory does not exist. If you want to do something more elaborate, you could create a script and show a more clear indication that the loop condition became true: #!/bin/bashwhil...
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: for VARIABLE in 1 2 3 4 5 .. N do c...
在循环过程中,有时候需要在未达到循环结束条件时强制跳出循环,Shell 使用两个命令来实现该功能:break 和 continue。 break 命令 break 命令允许跳出所有循环(终止执行后面的所有循环)。 下面的例子中,脚本进入死循环直至用户输入数字大于 5。要跳出这个循环,返回到 shell 提示符下,需要使用 break 命令。 #!/bin/ba...
For example, you can add the nested loop example to a Bash script to improve its readability, like this: $vimcopy_web_files.sh# !/bin/bashforiinfile{1..3};doforxinweb{0..3};doecho"Copying$ito server$x"scp$i$xdonedone When you save and execute this script, the result is the ...
更加高级的shell编程 自带manual的bash脚本 一个好的脚本是应该自带说明manual的。例如,一个脚本需要运行的参数,参数的使用说明等。 下面给大家一个模板例子: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 bash getdata.sh *** This script needs arguments to work! *** Usage: getdata.sh PRJNUM COUNT...
One can use the for loop statement even within a shell script. While the For Loop is a prime statement in many programming languages, we will focus on how to use it for the bash language. Are you ready to add yet another tool to your developer arsenal? Let’s explore deeper into the...
fruit=orange; and on the third and final iteration,fruit=pear. Once it has completed the loop, the script continues normal execution with the next command after thedonestatement. In this case, it ends by saying “Let’s make a salad!” to show that it has ended the loop, but not the...
Linux Bash Script loop shell 编程之流程控制 for 循环、while 循环和 until 循环 for var in item1 item2 ... itemN do command1 command2 ... commandN done 1. 2. 3. 4. 5. 6. 7. for var in item1 item2 ... itemN; do command1; command2… done; ...
[zexcon@fedora ~]$ ./learnToScript.sh numberTwelve variable is equal to 12 你所看到的是if语句的第一行,它在检查变量的值是否真的等于12。如果是的话,语句就会停止,并发出numberTwelve is equal to 12的回显,然后在fi之后继续执行你的脚本。如果变量大于12的话,就会执行elif语句,并在fi之后继续执行。当...