While running bash scripts, you'll come across times when you want to run tasks repeatedly such as printing the value of a variable in a specific pattern multiple times. In this tutorial, I'm going to walk you through the following: The syntax of the while loop Multiple examples of the ...
In Bash scripting, thewhileloop functions by repeating a set of instructions as long as the specified condition is true. Typically, the while loop is preferred where the number of iterations is uncertain or variable. In this guide, I will explore theBash while loop, its syntax, and usage th...
如果我在while-loop中使用服务器名,它可以工作,但是我需要为每个服务器使用一个while-loop,而不是一个。所以这就是我现在所拥有的,但我不能让它运行。我对剧本有点陌生,所以我很感谢所有的帮助 #!/bin/bash servers=("qaServerName1 qaServerName2 qaServerName3 ... ...") for VARIABLE in $servers do...
#!/bin/bashn=9999for(( i =1; i<=100;i++))do/root/testProgram$nsleep5 n=$((n+1))done REFER:How to increment a variable in bash?
“i” with 2. At the following line, we use the “while” loop to iterate itself until its specified condition is satisfied. The condition says that the value of a variable “i” must be less than or equal to “14” via the “-le” operator of Bash. If so, the loop will execute...
While ShellCheck is mostly intended for interactive use, it can easily be added to builds or test suites. It makes canonical use of exit codes, so you can just add ashellcheckcommand as part of the process. For example, in a Makefile: ...
While loop Until loop This article is part of the on-goingBash Tutorialseries. Loops can be nested. Like any other programming language, bash also supports break statement to exit the current loop, and continue statement to resume the next iteration of the loop statement. ...
while IFS= read -r _; do ((count++)) done < "$1" printf '%s\n' "$count" } 1. 2. 3. 4. 5. 6. 7. 8. 用法示例: $ lines ~/.bashrc 48 $ lines_loop ~/.bashrc 48 1. 2. 3. 4. 5. 计算目录中的文件或目录 这是通过将glob的输出传递给函数然后计算参数的数量来实现的。
# Loop from 0-100 (no variable support).foriin{0..100};doprintf'%s\n'"$i"done 循环遍历可变数字范围 替代seq。 # Loop from 0-VAR.VAR=50for((i=0;i<=VAR;i++));doprintf'%s\n'"$i"done 循环数组 arr=(apples oranges tomatoes)# Just elements.forelementin"${arr[@]}";doprintf'%s...
and check for the existence of the number1within that file using agrep -q(a quiet grep). We keep doing so (i.e.while) until it is no longer true. Whilst it is true, we print the textyesand pause the loop for five seconds withsleep 5. Note how each command is terminated with;aga...