(转) 一个从fedora7中拷贝过来的bash脚本,居然不能在ubuntu下面执行,提示错误 Bad for loop variable G了一把,在TW同胞那里找到了答案～原来是bash和dash的问题 解决方法: 使用 sudo dpkg-reconfigure dash 选择NO。。 世界又清静了~(经典!) 感谢link:http://hi.baidu.com/yk103/blog/item/1e9831fa3fc23d...
Shell 脚本(shell script),是一种为 shell 编写的脚本程序。 业界所说的 shell 通常都是指 shell 脚本,但读者朋友要知道,shell 和 shell script 是两个不同的概念。 由于习惯的原因,简洁起见,本文出现的 "shell编程" 都是指 shell 脚本编程,不是指开发 shell 自身。 Shell 环境 Shell 编程跟 JavaScript、php...
array_name[0]=value0 array_name[1]=value1 array_name[2]=value2 5.读取数组 读取数组元素值的一般格式是: ${array_name[index]} 6.实例 #!/bin/bash # author:菜鸟教程 # url:www.runoob.com my_array=(A B "C" D) echo "第一个元素为: ${my_array[0]}" echo "第二个元素...
Another practical use case is synchronizing the contents of two folders. There are two loops in theSyncFolder.ps1script, both using theForEach-Objectcmdlet. The first loop replicates the source folder’s folder structure to the destination folder. The second one performs the file copy operation. ...
until [ "$num" -gt 10 ]; do echo "num is $num" num=$(($nu + 1)) done break 是结束 loopreturn 是结束 functionexit 是结束 script/shell 原文:https://www. 整理了250个shell脚本,拿来即用!mp.weixin.qq.com/s/hXhgdrYorMZLdw-48vaBtg...
Shell script 是解释型语言,而不是编译型语言shell 分好多种,如果想看你的操作系统中支持哪几种,可以执行如下命令: cat /etc/shells 输出如下(每个人的不一样): # List of acceptable shells for chpass(1). # Ftpd will not allow users to connect who are not using ...
for skill in Ada Coffe Action Java do echo "I am good at ${skill}Script" Done 如果不给skill变量加花括号,写成echo "I am good at $skillScript",解释器就会把$skillScript当成一个变量(其值为空),代码执行结果就不是我们期望的样子了。(推荐使用花括号) 只读变量:使用 readonly 命令可以将变量定义...
for item # A for loop by default loop through $1, $2, ... do ip_arr=("${ip_arr[@]}" "$item") echo "Element $i: $item" ((i++)) done 5. Shell 获取数组长度 array=(bill chen bai hu); num=${#array[@]} 遍历数组: ...
13. How do you create a loop in a shell script? Shell scripts can use loops such as the “for” and “while” loops. The “for” loop is used to iterate over a sequence of values, whereas the “while” loop is used to repeat commands as long as a certain condition is true. 14...
breakexits from afor,select,while, oruntilloop in a shell script. Ifnumberis given,breakexits from the given number of enclosing loops. The default value ofnumberis1. Usage Notes This is a special built-in command of the shell. Exit Values ...