for i in 1 2 3 4; do echo $i; done 2、测试for的自增长的循环: #!/bin/bash for ((i=1; i<=5; i++)) do echo $i; done 如果会报错,没有则跳过: Syntax error: Bad for loop variable 原因:代码对于标准bash而言没有错,因为Ubuntu为了加快开机速度,用dash代替了传统的bash,是dash在捣鬼。
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 AI检测代码解析 #!/bin/bash # List of values for item in apple banana che...
问For Loop in Shell脚本-在csv文件中添加隔断线EN我正在执行一个文本文件中的命令。我希望每个命令执行...
该值表示列位置-列名称-列类型 下面是work-in-progress代码块。放置注释以突出问题 #!/bin/sh #initiat variables here retval=0 #this is a variable related with issue #get configuration details from the table encrpt_avoid_flag=Y #extract all files in loop #get part of file_name to related con...
把系统升级了之后(有的时候更新系统也许也会遇到),发现使用shell,运行时会有报错:Syntax error: Bad for loop variable。仔细查看语法,并没有问题。后来才知道原因: 代码对于标准bash而言没有错,因为Ubuntu为了加快开机速度,用dash代替了传统的bash,是dash在捣鬼。
If you don’t specify the keyword “in” followed by any list of values in the bash for loop, it will use the positional parameters (i.e the arguments that are passed to the shell script). $ cat for3.sh i=1 for day do echo "Weekday $((i++)) : $day" ...
今天晚上在实验室没事写了个简单的shell script 如下: #!/bin/bash 2 #program: 3 # try to calculate 1+2+3+...+[your input] 4 #History: 5 #2012/10/27 mupeng First release 6 7 read -p "input a number I will calctlate 1+2+..+[your input] " nu ...
shell脚本Syntax error: Bad for loop variable 在shell脚本中写for循环出现这个问题 原因: 从 ubuntu 6.10 开始,ubuntu 就将先前默认的bash shell 更换成了dash shell;其表现为 /bin/sh 链接倒了/bin/dash而不是传统的/bin/bash。 解决办法:sudo dpkg-reconfigure dash 选择no 出现如下: 接着运行: 显示成功....
Linuxshellfor循环运行python程序linuxshell脚本for循环 问题本案例要求编写一个Shell脚本chkhosts.sh,利用for循环来检测多个主机的存活状态,相关要求及说明如下: 待检测的多个目标IP地址,存放在ipadds.txt文件内 ping检测可参考前一天的pinghost.sh脚本脚本能遍历ping各主机,并反馈存活状态 执行检测脚本以后,反馈结果如图...
for loop + shell scripting HiIssue is i have a list of files and have to delete all files one by one but i am not able to use for loop. Actually there is one directory where some files like a1, a2 a3 will be there and we have to move files on the basis of lowest seqence fil...