In a shell script, aforloop allows you to iterate over a set of values or a range of numbers. Here are a few examples of how to useforloops in different contexts: Example 1: Iterating Over a List of Values #!/bi
3、/etc/rc.d/rc3.d目录下分别有多个以K开头和以S开头的文件;分别读取每个文件,以K开头的输出为文件加stop,以S开头的输出为文件名加start,如K34filename stop S66filename start for files in /etc/rc.d/rc3.d/[KS]* ;do if [ `basename $files|cut -c1` == "K" ] ;then echo "$files stop...
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...
In a script, theForEachconstruct is the most common way to process items that you've placed into an array. It's easy to use because you don't need to know the number of items to process them. The previous example has only one command between the braces, but you ...
Shell编程中循环命令用于特定条件下决定某些语句重复执行的控制方式,有三种常用的循环语句:for、while和until。while循环和for循环属于“当型循环”,而until属于“直到型循环”。循环控制符:break和continue控制流程转向。 参考:《Linux 与unix shell 编程指南》 ...
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...
Shell scripting, specifically Bash scripting, is a great way to automate repetitive or tedious tasks on your systems. Why type when you can schedule and run scripts in a hands-free manner? One of the many scripting constructs is the loop. A loop is a section of code that picks up data ...
学习shell脚本 2019-12-20 17:41 − 脚本执行方式: source:用这个命令执行shell脚本的时候,不会创建新的bash(子进程),可以直接在父进程中执行,所以shell里面的变量会被改变。 sh script和./script:会创建子进程,在子进程里执行完shell后,父进程里的变量不会改变。 ... PYozo_free 0 326 shell一文入门...
/bin/bashsource_prefix=$1suffix=$2destination_prefix=$3foriin$(ls${source_prefix}*.${suffix});domv$i$(echo$i|seds/${source_prefix}/${destination_prefix}/)done In this script, the user provides the source file's prefix as the first parameter, the file suffix as the second, and ...
echo$loop1 done 1 2 3 4 5 6 7 8 9 用法一例子(打印shell脚本的参数,文件名for4.sh) #!/bin/bash forparamsin$* do echo“You supplied $params as acommandline option” done echo$params 修改添加可执行权限:chmodu+x for4.sh 运行:./for4.sh a b c d e f ...