關於 shell while true ，我們在網路上蒐集到這些相關的討論、資訊與評價

#11. shell中while true用法 - 稀土掘金

在Shell脚本中， while true 用法是一种常见的循环结构，它会一直循环执行，直到遇到 break 或者程序被中断为止。 下面是一个简单的示例，演示了 while true 的用法：

#12. while - perform a set of commands multiple times - fish shell

Even more complex control can be achieved with while true containing a break. The -h or --help option displays help about using this command. Example¶. while ...

#13. 在shell脚本提示中退出"while true; do "循环 - 七牛云

在shell脚本提示中退出"while true; do "循环. 0 人关注. 我目前在Linux上的项目是要做一个有三个选项的脚本：是、否和假输入。

#14. Unix / Linux Shell - The while Loop - Tutorialspoint

Unix / Linux Shell - The while Loop ... The while loop enables you to execute a set of commands repeatedly until some condition occurs. It is usually used when ...

#15. Bash While Loop Examples - nixCraft

The bash while loop is a control flow statement that allows code or commands to be executed repeatedly based on a given condition. For example, ...

#16. Bash Script 語法解析. 各種單雙括弧、特殊符號語法 - Medium

各種單雙括弧、特殊符號語法. “Bash Script 語法解析” is published by Vince in vswe. ... while true; do echo $(whoami); sleep 1; done;$ a=1

#17. Bash while Loop | Linuxize

The while loop is used to performs a given set of commands an unknown number of times as long as the given condition evaluates to true. The Bash ...

#18. A shell one-liner for an infinite loop (sh/zsh/bash compatible)

A shell one-liner for an infinite loop (sh/zsh/bash compatible) - sleep5.sh. ... sleep5.sh. while true; do date; sleep 5; done ...

#19. bash shell 死循环-之路教程

bin/bash while : do echo "Press [CTRL+C] to stop. ... 在linux shell脚本中，如何编写死循环? ... 空命令不执行任何操作，并且其退出状态始终设置为true。

#20. Bash Scripting – While And Until Loop Explained With Examples

Here in the while loop, the condition is evaluated first, and if the condition is true, the block of code will be executed until the condition ...

#21. 十一、Shell之while&&until循环- yaowx - 博客园

一、while语句介绍while循环语句主要用来重复执行一组命令或语句， ... /bin/bash while true #每2秒输出1次，这里需要while的死循环do uptime #系统 ...

#22. bash shell的while循环| myfreax

本教程解释了Bash中while循环的基础知识，以及用于改变循环流的break和continue语句。 Bash while Loop. 只要给定条件的计算结果为true，while循环就会 ...

#23. [shell script] shell script 的無窮迴圈寫法 - 迷途工程師

你可以while true 或是while sleep 1s ｡ while 後是放命令,判斷命令的返回值｡ true 是永遠返回0 , sleep 正常退出也不會報錯｡

#24. how to exit a while true loop - The UNIX and Linux Forums

Hello Team, In my shell script, it stopped without killing it. Could you please help why ? Below is the code : get_dpi44_currentFiles() { ...

#25. Shell Scripting while loop - Javatpoint

Linux scripting while loop is similar to C language while loop. There is a condition in while. And commands are executed till the condition is valid.

#26. Create An Infinite Loop in Shell Scripts - TecAdmin

This article will discuss how to create infinite loops using 'for' and 'while' constructs in shell scripting, along with practical examples. 1.

#27. Bash while loop to run command for specific time with examples

Run shell script for 5 min bash while loop Linux sleep. bash wait. bash for loop. bash script for loop in shell script. bash sleep. script timer bash sleep.

#28. 如何在Bash 中使用While 迴圈| D棧

bash Copy #!/bin/bash while true do echo "This is an infinite while loop. Press CTRL + C to exit out of the loop." sleep 0.5 done.

#29. Shell Scripting While Loop - Coding Ninjas

You can use something as a condition for the while loop if you can evaluate it as TRUE or FALSE. Boolean Operators. These are shell script- ...

#30. Shell Scripting Tutorials: Looping & Iteration statatement using ...

The bash while loop is a control flow statement that allows code or commands to be executed repeatedly based on a given condition.

#31. “while” Loop Examples in Shell Scripts - The Geek Diary

There are two commands in the shell that always return the same exit status. These commands are true and false. The true command always causes the test to ...

#32. Linux shell script: while loop and sleep example

While you're at it, can you show how to use the sleep command in the shell script while loop? Sure. As a little background, I've written a ...

#33. shell基础（四）while循环- 一名IT小学生- 简书

#!/bin/bash while [ 1 ] #[ 1 ]和true 一样，只是前面2边需要有空格do uptime >>/tmp/uptime.log sleep 2 done #uptime用于查看系统负载，具体可 ...

#34. Error with my shell scripting - KodeKloud

Need some help with a shell scripting. This is my code: while true do echo "1. Add" echo "2. Subtract" echo "3. Multiply" echo "4. Divide" echo "5.

#35. while and until (Learning the Korn Shell, 2nd Edition)

These are similar; both allow a section of code to be run repetitively while (or until) a certain condition holds true. They also resemble analogous constructs ...

#36. 認識SHELL

所以﹐我們在使用電腦的時候﹐基本上就是和shell 打交道﹐而不是直接和kernel 溝通。 ... True if file exists and is greater than zero in size ... while 指令語法

#37. Node.js Python-shell: while true loop not working - 汇智网

I've this simple Python script print out a message every second: #!/usr/bin/python import time while True: print u"Message" time.sleep(1) I'm trying to ...

#38. 第二十一章Shell Script - twbsd.org

因此，為了能寫出一個shell Script，你必須先對UNIX 指令有初步的認識。 ... 這裡我們使用test 及[ 來做運算，運算所傳回的結果是真(true) 或假( false)。

#39. Shell 流程控制 - 菜鸟教程

Shell 流程控制和Java、PHP 等语言不一样，sh 的流程控制不可为空， ... while true do command done ... until 循环执行一系列命令直至条件为true 时停止。

#40. shell循环结构之while循环 - 阿里云开发者社区

while [ $i -le 100 ]; do. let sum=sum+i. let i=$i+1. done. echo $sum. 2). while true; do. statement. statement. done. #!/bin/bash.

#41. 使Shell指令具Wait功能 - 成大醫院

Loop While ExitCode = STILL_ALIVE Call CloseHandle(hProcess) isDone = True 另外，如果您的shell所Create的程式，有視窗且為立刻Focus者，可另外用以 下的方式Dim ...

#42. Using for loops and while loops in a shell script

This makes it a repeat loop, not a traditional while loop. The colon ( : ) always evaluates to true; whilst using this can be necessary sometimes, ...

#43. Creating a Simple Select Menu in the Shell Script - Baeldung

Learn how to create a menu with a list of options in Bash. ... Therefore, we need to put select into an infinite while true loop to refresh ...

#44. shell十三問之13： for what？ while與until差在哪？ - Jason Blog

while loop 的原理與 for loop稍有不同： 它不是逐次處理清單中的變量值， 而是取決於 while 後面的命令行的return value：. 若為true， 則執行 do 與 done 之間的命令， ...

#45. [Linux]shell腳本每秒鐘執行/每個月校正時間| Decrease - - 點部落

說明: #!/bin/bash while : #loop 同while (true) do #執行指令 sleep #時間間隔 done 每個月校正時間: 紀錄log、校正依據10.x.x.x的時間、當下時間， ...

#46. 第十二章、學習Shell Scripts - 鳥哥的Linux 私房菜

加上我們可透過shell script 來簡化我們日常的工作管理， 而且，整個Linux 環境中，一些服務(services) ... 12.5.1 while...do...done, until...do...done (不定迴圈) ...

#47. [Shell Scripting] 教學：控制結構(Control Structure) - 開源教學

如同大部分的程式語言，shell script 的執行順序是由上而下、依序執行。 ... while condition; do # Run code here while `condition` is true. done.

#48. How to Use until Loop in Your Shell Scripts - Tecmint

In bash for, while, and until are three loop constructs. ... While loop runs the code block while the expression is true and until loop does ...

#49. Shell Scripting - True Command - GeeksforGeeks

It is used to create infinite loops not only in shell scripting but also in other programming languages. Example: #!/bin/sh # while true: Print ...

#50. 7 Examples of How to use While Loop in Bash Shell Scripting

Generally speaking, the while loop is used to execute one or more commands (statements) until the given condition is True. As the condition becomes false, ...

#51. How does While loop work in Shell Scripting? - eduCBA

In the above syntax example, until the condition evaluates to true all the commands command1, command2 between do and done keywords will be ...

#52. Python "while" Loops (Indefinite Iteration)

The while Loop · n is initially 5 . The expression in the while statement header on line 2 is n > 0 , which is true, so the loop body executes. · When the body of ...

#53. 【Linux入門】while文による繰り返し処理をわかりやすく解説！

Linuxのシェルスクリプトには他のプログラミング言語同様while文による繰り返し処理が可能です。 ... #!/usr/bin/bash; while true; do; echo LOOP; sleep 1; done.

#54. Boucle while | Mon pense-bête

En bash et ksh, la commande true propose exactement la même chose. $ nl boucleWhile05.sh 1 #!/bin/bash 2 while true 3 do 4 echo "Boucle infinie"

#55. 2(WHILE & UNTIL LOOP) IN SHELL SCRIPTING ... - YouTube

ITERATIVE STATEMENTS - 2( WHILE & UNTIL LOOP ) IN SHELL SCRIPTING LINUX / UNIX || CONTROL STRUCTURES. Sundeep Saradhi Kanthety.

#56. 8.6. Looping Commands

The Bourne shell has three types of loops: for, while, and until. 8.6.1 The for Command. The for looping command is used to execute commands a finite number of ...

#57. Shell脚本中for循环、while循环及case分支语句

[root@localhost ~]# vim game.sh #!/bin/bash PRICE=$(expr $RANDOM % 1000) TIMES=0 echo "商品实际价格为0-999之间，猜猜看是多少？" while true do read -p "请 ...

#58. How to include options in your Bash shell scripts

Repeat this process until no options remain. Start with a simple Boolean option (sometimes called a switch or a flag): #!/bin/bash while [ True ]; ...

#59. Shell Script Error "syntax error near unexpected token" or "bad ...

Here is a short test script illustrating the problem: # cat test_script5.sh #!/bin/bash IP=0 loop=0 while true do loop=$(($loop+1)) echo Loop number $loop ...

#60. SC2104 – In functions, use `return` instead of `break`.

Rarely valid foo() { break; echo $?; } while true; do foo; done ... bash versions before 4.4, will return from the function, break the loop calling the ...

#61. Linux shell script | 程式學習紀錄 - - 點部落

while 命令. do. 命令1. 命令2. done. EX: while read LINE. do. echo $LINE. done <name.txt. EX: while true. do. cmd=$(getcmd).

#62. 關於shell script的問題[論壇- Ubuntu 程式設計]

times=0 while true; do times=$(expr $times + 1); if [ $times -eq 5 ]; then continue; fi if [ $times -gt 10 ]; then break; fi echo 'times:' ...

#63. Shell Scripting 101: While Loop in Shell Script

A while loop in shell scripts is used to repeat instructions multiple times until the condition for the loop stays true. Loops have a lot of use ...

#64. Shell Script簡易教學 - 平凡的幸福

一般會將Shell Script的副檔名命名為.sh，雖然副檔名在Linux中並非必要， ... 接著我們使用test 及[ 來做運算，運算所傳回的結果是真(true) 或假( ...

#65. Python while Loop (With Examples) - Programiz

If the condition evaluates to True , the code inside the while loop is executed. condition is evaluated again. This process continues until the condition is ...

#66. How to Write Scripts for Oracle Solaris with the Korn Shell

While many developers use the C shell because of its C-like syntax, this is a subjective choice and this article uses the Korn shell exclusively.

#67. Shell scripting - looping and counting - magicmonster.com

Running something every second ; while true; do ; echo print every second ; done.

#68. Cisco IOS Shell Configuration Guide, Cisco IOS Release 15S

Users can exit a 'while' or 'for' loop early by using a 'break' statement. Here is an example. n=0 while true; do let n++ if [[ $n -le 10 ]]; ...

#69. C Shell Scripts

What is a Shell Script? A shell script is an executable file which contains shell commands. ... Used to interrupt the execution of a foreach or while loop.

#70. linux shell 脚本- 大大通(繁體站)

在实际工作中涉及到数据库/文档定时备份的需求，因此学习了shell脚本。在此总结记录下1. shell 脚本1.1 shell 环境常见 ... while : do command done # 2. while true

#71. How to Run a Shell Script in Infinite Loop - TechieRoop

You can run a shell script in infinite loop by using while loop. #!/bin/bash while true do echo "Press CTRL+C to stop the script execution" ...

#72. While loop in tcsh - Google Groups

I was trying to code a simple while loop in tcsh shell. #!/bin/tcsh set cnt=5 while ($cnt > 0) cnt = $cnt(`expr($cnt - 1))

#73. Advanced Bash Shell Scripting Guide - Loops - Linuxtopia

A loop is a block of code that iterates (repeats) a list of commands as long as the loop control condition is true. for loops. for arg in [list]. This is the ...

#74. What is the best way to do an infinite loop in a shell script?

comma · #!/bin/bash · while true · do · echo "Press [CTRL+C] to stop.." · sleep 1 · done · while :; do echo 'Hit CTRL+C'; sleep 1; done.

#75. shell脚本的使用该熟练起来了，你说呢？（篇四） - 知乎专栏

Shell 中的test 命令用于检查某个条件是否成立，它可以进行数值、字符和文件三个方面的试。 数值测试 ... while true do command done.

#76. Tutorial12: Shell Scripting - Part 2 - CDOT Wiki

In order to loop while the result is TRUE (not FALSE), you can use the negation symbol (!) to set the test condition to the opposite. Use a text editor like vi ...

#77. A Simple Guide to Linux Shell Scripting With Bash | Petri

Running code while a condition is true. The for loop isn't the only type of loop we can use in Bash — we also have while : This type of ...

#78. 리눅스 무한반복 스크립트 repeat.sh - 제타위키

Bash. Copy. while true; do # 반복 수행할 내용 기입 done. Bash ... done' > repeat.sh [root@zetawiki ~]# cat repeat.sh #!/bin/bash while true; ...

#79. 【bash】while文の使い方を解説します【無限ループの使い方】

【bash】while文の使い方を解説します/while true doも解説. シェル/bash. こんにちは。 普段はIT業界についてのブログを執筆してるエンジニアです。

#80. What is the Right Way to do Bash Loops? - Shell Tips!

This loop often uses a while true loop construct and is sometimes called an endless loop or a forever loop. The collection-controlled loop ...

#81. How to loop with case esac in shell scripting? - Ask Ubuntu

What do I do wrong here? Thanks, Jen. #!/bin/bash function project1_install_dir_path() { boolian_2=true; while ...

#82. shell 将if、for、while写在一行 - FFing

#if范例if [ $? -eq 0 ] then echo Ok else echo Bad fi #for范例for i in `seq 9 ` do echo "当前循环次数：" echo $i done #while范例while true； ...

#83. Errors and Signals and Traps (Oh, My!) - Part 2

#!/bin/bash echo "this script will endlessly loop until you stop it" while true; do : # Do nothing done. After we launch this script it will appear to hang.

#84. 【初心者でもすぐわかる】シェルスクリプトwhileの使い方

「while :」や「while true」や「while [ 1 ]」とすると無限ループが発生する。 ... 抜けだせなくなる初歩的な例. vi while-bad-ex1.sh. Shell.

#85. Unix Shell Loop Types: Do While Loop, For Loop, Until Loop ...

Overview of Unix Shell Loops and different Loop Types like Unix Do While Loop, Unix For Loop, Unix Until Loop. Learn these Unix loops with ...

#86. Vòng lặp while trong Shell - QuanTriMang.com

Cách dùng While do shell trong Linux như thế nào? ... while command do cac lenh de thuc thi neu command la true done.

#87. Bash scripting cheatsheet - Devhints

This is a quick reference to getting started with Bash scripting. ... #!/usr/bin/env bash name="John" echo "Hello $name!" ... while true; do ··· done ...

#88. Learn The Concept Of Until Loop in Linux Shell Scripting

While the for loop iterates over a list or range of values, and the while loop iterates while a condition is true, the until loop continues to ...

#89. Linux Bash/Shell simple, basic flow control (for loop, while ...

Simple guide for flow control in linux bash/shell scripts, if else, while loop, until loop, for loop, case/select.

#90. Shell-Programmierung – 4.11 Die while-Schleife

Die einzelnen Kommandos zwischen do und done werden bei der while-Schleife abgearbeitet, solange die Bedingung wahr (0 oder auch true) ist.

#91. kubectl exec examples - Execute Shell commands into a POD

Since it is a while true loop it would keep your session active. to stop it you need to CTRL+C. This is another way to keep your session active ...

#92. Bash Scripting Tutorial – Linux Shell Script and Command ...

While loops check for a condition and loop until the condition remains true . We need to provide a counter statement that increments the counter ...

#93. Running a command until it succeeds - Packt Subscription

On most modern systems, true is implemented as a binary in /bin . This means that each time the aforementioned while loop runs, the shell has to spawn a ...

#94. 매초마다 반복되는 shell script 한줄 구문 - 데브원영

while true ; do 명령문 sleep 시간; done 상기와 같이 수행하면 된다. 시간(seconds)마다 명령문을 입력한다. Example5초 마다 ls 명령어 호출 ...

#95. Do Until Loop in PowerShell - ShellGeek

PowerShell Do until loop keeps running until the condition is false, it will stop when condition become true. Do Until at least run one time.

#96. How to Use if-else in Shell Scripts? - DigitalOcean

While we believe that this content benefits our community, ... If the condition evaluates to TRUE, the processor will execute the ...

#97. 快速學會Shell Script - Jame's Blog

bin/bash # Welcome to the Interactive Shell . ... in $(ls) do cat "$Output" done # 使用while 迴圈: while [ true ] do echo "loop body here.

#98. Loops — Ansible Documentation

Ansible offers the loop , with_<lookup> , and until keywords to execute a task ... name: Register loop output as a variable ansible.builtin.shell: "echo ...