[Bash] for loop The basic syntax of a for loop in Bash is: forvariableinlistdocommandsdone Examples Example 1: Iterating Over a List of Words #!/bin/zshforwordinapple banana cherrydoecho"The word is:$word"done Example 2: Iterating Over a Range of Numbers...
In the first part, a variable is initialed with an initial/start value, then in condition, the end value is specified which means the loop can go only till the specified end value. and in the last, the increment value is specified that basically increment the initialized variable by one. ...
"Welcome to Ostechnix"is the list of items passed to thefor loopand each word will be picked as a separate iteration and stored in a variable (val). The variable can be named anything. Here I name it asval. There are three items in the list so there will be three iterations in the...
The script below demonstrates exiting from aforloop with thebreakkeyword. Theforloop is set to iterate if thexvariable’s value is less than or equal to themaxvariable’s value. However, there is atestcommand inside theforloop. Thetestcommand checks if the value of thexvariable is equal ...
Example 1 - for Loop to Read Input Variable Using the for loop, it is straightforward to read the predefined strings or array. Here is an example of how you can use the for loop. In the example, we will take the input value of a text that has multiple words that will be taken afte...
command1 on $VARIABLE command2 commandN done 1. 2. 3. 4. 5. 6. OR for OUTPUT in $(Linux-Or-Unix-Command-Here) do command1 on $OUTPUT command2 on $OUTPUT commandN done 1. 2. 3. 4. 5. 6. Examples This type of for loop is characterized by counting. The range is specified ...
在此标准bash for loop示例中,如果我们有基于Debian / Ubuntu的服务器,我们将使用yum命令或apt命令/ apt-get命令更新所有基于CentOS / RHEL的服务器: ## CENTOS/RHEL example (for fedora replace yum with dnf) ##for s in server0{1..8}do echo “*** Patching and updating ${s} ***” ssh root...
“ for循环”是bash编程语言的语句,它允许重复执行代码。 for循环被归类为迭代语句,即bash脚本中进程的重复。 例如,您可以运行UNIX命令或任务5次,或使用for循环读取和处理文件列表。 可以在shell提示符下或在shell脚本本身内使用for循环。 更详细信息 请看: Bash For Loop Examples In Linux for循环语法 数字范围的...
今天早上ubuntu下写了一段脚本,往数据库里批量插入数据,结果Bad for loop variable;在网上查阅解决方案,找到了解决方案。如下:解决方案:sudo dpkg-reconfigure dash选择NO。然后能正常运行了
bash for loop examples To process the list of five numbers and print their values. for i in 1 2 3 4 5 do echo “Value is $i” done Value is 1 Value is 2 Value is 3 Value is 4 Value is 5 In this example: i is used as variable name, a short name for index value, most co...