在编程语言中,循环(Loops)是必不可少的组件,当你想要一遍又一遍地重复代码直到满足指定条件时使用。在Bash脚本中,有3种类型的循环:for循环、while循环和until 循环。这三个用于迭代值列表并执行一组给定的命令。在本文中,主要介绍下Linux系统中的Bash For循环。
InBashscripting, there are 3 types ofloops:for loop,while loop, anduntil loop. The three are used to iterate over a list of values and perform a given set of commands. In this guide, we will focus on theBash For Loopin Linux. Bash For Loop Syntax As mentioned earlier, thefor loopit...
echo "infinite loops [ hit CTRL+C to stop]" done 1. 2. 3. 4. 5. 带断点的条件退出 您可以在for循环中使用break语句提前退出。您可以使用break从FOR、WHILE或UNTIL循环中退出。for循环中的General break语句 for I in 1 2 3 4 5 do statements1 #Executed for all values of ''I'', up to a...
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 ...
Linux下Shell的for循环语句 第一类:数字性循环for1-1.sh for1-2.sh for1-3.sh for1-4.sh 第二类:字符性循环for2-1.sh for2-2.sh for2-3.sh for2-4.sh 第三类:路径查找 for3-1.sh for3-2.sh 总结: 现在一般都使用for in结构,f
There are two types of bash for loops available. One using the “in” keyword with list of values, another using the C programming like syntax. This article is part of our on-going bash tutorial series. This explains both of the bash for loop methods, an
for 变量 in 列表 do 语句 done 格式三 for ((变量=初始值; 条件判断; 变量变化)) do 语句 done 使用示例 for的无限循环 #!/bin/bash for(( ; ; )) do echo"infinite loops [ hit CTRL+C to stop]" done 示例一 Bash代码 for s in ac apropos at arp ...
For Loops Unlike most loops, the for loop does not test the condition of a variable each time it goes around the loop. Instead, it starts with a list of … - Selection from Shell Scripting: Expert Recipes for Linux, Bash, and More [Book]
We hope that Bashforloops change your world the same way they changed ours. About the authors Nathan Lager Nate is a Technical Account Manager with Red Hat and an experienced sysadmin with 20 years in the industry. He first encountered Linux (Red Hat 5.0) as a teenager, after deciding that...
There’s a very easy and common mistake when dealing with for loops, due to the way bash handles quoted arguments/strings. Looping through a list of files should be done like this: forfileinone.c two.c Not like this: forfilein"one.c two.c" The second example encloses filenames in ...