Bash for loop wait Whether you're going through an array of numbers or renaming files, for loops in Bash scripts provide a convenient way to list items automatically. 6 days ago · Learn tips for using Azure CLI successfully, such as output formats, passing parameter values, and quoting rules for different shells. The sleep command is a powerful tool in Bash scripting that introduces a delay in the execution of the scripts. Aug 26, 2024 · When working with infinite loops in Bash scripts, it’s crucial to consider resource management. Does loop wait for execution of the command in its body before iterating? Thanks in Advance Here is my code. Jun 5, 2015 · I have a shell script with a for loop. Need to put the n flag after, as that is is telling read to execute after N characters are entered, do not wait for an entire line. g. Apr 17, 2014 · The Bash builtin wait can wait for a specific background job or all background jobs to complete. Indeed, a simple infinite loop in a single thread can prevent process completion. I know how to put a sleep into a for loop in a bash script, but I don't know how to put it into this. If you want to avoid experimental features, you can achieve similar result with bash while loop. Thus, we can use the while loop to initiate an infinite sleep in Bash and block a process entirely: $ while true do sleep 1 done This loop will execute the sleep 1 command repeatedly, indefinitely putting the shell to sleep for one second at a time. The script isn't waiting for a key. Here’s a simple example of a ‘for’ loop: Bash‘s read builtin along with options like -n, -t, and checking for specific keypresses provides several ways to wait for user input in a script. This two-line pattern forms the foundation for all wait usage. Jun 19, 2025 · I wrote up a quick bash script to loop from 1 to 20 with curl requests and sleeping for a short period between each request. Check help read and this for details. start /wait "$ (pwd)\Tools\mybat. I know I can wait on a condition to become true in bash by doing: while true; do test_condition && break sleep 1 done But it creates 1 sub-process at each iteration (sleep). Therefore, if you want to have more control over your bash scripts’ execution time, then read this thoroughly. Nov 3, 2020 · I am running a bash file to submit several lumerical jobs. A parallel implementation of make will not only take care of starting jobs and detecting their termination, but also handle load balancing, which is tricky. This allows creating interactive scripts that pause and continue based on keypresses. txt) do echo "${p}" done I get this output on the screen: Start! . I thought it would be pretty easy to make the url, number of requests and delay command line arguments. kubectl wait is still in experimental phase. You want to use wait -n -p var in a loop to wait for the next job to finish and keep track of which jobs have not yet finished yourself, rather then seeing which jobs have not yet reported their exit status. Discover simple techniques to enhance your scripting efficiency. You can make a function that implements the desired behavior for a file and then call it inside the loop. My idea is to call my function as a background process and after every Nth call I want to wait for all background processes. bat" I try to execute this command, but git bash does not wait for the bat completion. Consequently, when we run Nov 2, 2024 · Prefer Wait When Possible Bash‘s built-in wait command can also pause scripts until processes finish. This isn't the simplest solution, but if your version of bash doesn't have "wait -n" and you don't want to use other programs like parallel, awk etc, here is a solution using while and for loops. , a backup, compilation, or data processing task) to finish before starting another critical process. bash sleep. This article covers the different types of loops in Bash, including `while`, ` Master the art of bash for loop parallel processing. To use it wait will wait until all child background processes are finished. Parallel Processing Primer Feb 3, 2025 · Bash infinite loop examples and syntax - learn how to setup an infinite loop using bash under UNIX / Linux / Mac OS X/ BSD operating systems. Aug 1, 2020 · When writing shell scripts, I repeatedly have the need to wait for a given condition to become true, e. Aug 10, 2011 · how would I make this pause for 10mins then start back up and continuously loop Aug 24, 2020 · When encounter number 2 ask user to confirm continue skip skip I test that read command individually (not inside a function, directly as a command line only), it works properly, the issue not because of read command, its because it not able to pause inside a function of shell script. Discover the power of bash fork to create simultaneous processes. Dec 27, 2023 · An Introduction to Linux‘s Wait Command The wait command allows pausing the execution of a script or program until a specified process completes. . I need two ways to terminate a part of my bash script. However, I only want to pause so that my while true doesn't crash my computer. Jun 9, 2019 · Getting started with parallelization in Bash Using parallelization in code is a tricky proposition. The for Loop All scripting and programming languages have some way of handling loops. sh I have a couple ideas on how I would achieve this. bash for loop. Below is a snippet of code from a bash shell script I'm developing to plot some charts (with gradsdap). I want to wait until the the job is finished. ” Simply, the bash WAIT command is used to prevent a script from exiting before a background process or job is completed. You can also use the watch command to run a script repeatedly as well. I have written while loop in bash but it is still looping even the podstatus (variable) does not have "false" value in it. Note that background jobs started in a subshell would need to be waited for in the same subshell that they were started in. Discover how to streamline your scripts while optimizing performance effortlessly. Both the until and while loops follow the same syntax, until/while [condtion]. a remote URL becoming available (checked with curl) or a file that should exist, etc. txt ] ; do Apr 17, 2024 · In Linux, while loops are essential tools for automating repetitive tasks and controlling the flow of programs. Consequently, your curl s are subprocesses of that subshell, not the outer interpreter; so the outer interpreter cannot wait for them. This way, we don’t wait for one task to finish before starting the next. Oct 26, 2008 · When scripting in bash or any other shell in *NIX, while running a command that will take more than a few seconds, a progress bar is needed. The wait command returns the exit status of the last process it waited for. There is a small gotcha to watch out for. Oct 5, 2022 · You can use pgrep to create a while loop like this: #!/bin/bash # Wait for particular process to run while ! pgrep "process-name " > /dev/null; do # Set optional delay sleep . Nov 9, 2015 · Bash, run multiple commands simultaneously, wait for N to finish before spawning more Asked 10 years ago Modified 10 years ago Viewed 724 times Apr 26, 2025 · One such operation is an infinite loop, which can be useful in various scenarios, such as waiting for a specific event, continuously monitoring system resources, or repeatedly executing a command. A for loop follows the syntax, for x in {y}. Apr 28, 2024 · Following are 6 different examples of using the “wait” command in Bash such as waiting for a single background process, multiple background processes, the first background process, the background process within pipelines, and loops, and the trapping and executing cleanup actions. I'm trying by this way for example: sem --wait tells to wait until all the iterations in the for loop have terminated execution before executing the successive lines of code. How can I properly pause the function of shell script and wait for user input by providing a select menu Jun 5, 2019 · #!/bin/bash until [ ! kill -0 PID > /dev/null 2>&1 ]; do //code to kill process done //code to execute after process is dead Both these examples either fail to work, or keep on looping after the process has ended. For instance a simple clock in your bash terminal using watch could look like: How can I launch a process in background and check when it ends within a bash script? My idea is a script like this: launch backgroundprocess & while [ Process is running ];do echo "PROCES Feb 18, 2025 · Wait for an HTTP endpoint to return 200 OK with Bash and curl - wait_for_http_200. How to correct it? while read line do while : do read -n 1 key Oct 24, 2018 · If possible, I'd like to keep this a one liner, and avoid putting this into a bash shell script file. for loop in shell script. For example, you might want to wait for a resource-intensive job (e. Advanced resources are also provided for further learning. Sep 21, 2025 · Learn multi-threaded Bash scripting to optimize performance with background processes and job control. While “sleep infinity” itself consumes minimal resources, any additional code executed within an infinite loop can potentially strain system resources over time. e. Master this skill to streamline your scripts and enhance your workflow effortlessly. By pod name:. /runPep. Ideas please? #!/bin/bash count=0 while : ; do # dummy action Mar 5, 2023 · I would like to wait till all pods are in Running state. I prefer to use a combination of kill -0 and sleep to this. On Red Hat Enterprise Linux (RHEL) 6. hint: ':' evals to 0 ie true. Mar 18, 2024 · They occur when two processes wait for each other to complete. Mar 15, 2019 · for loop serialization and wait Ask Question Asked 6 years, 2 months ago Modified 6 years, 2 months ago How can I ping a certain address and when found, stop pinging. I have been trying the following script : #!/bin/bash set -x p Explore the primary Bash loop constructs—`for`, `while`, and `until`. The loop contains just a sleep of 10 seconds, so that it will check every ten seconds for the line you want. How can I run a for loop which pauses after each iteration until a key is pressed? for example, if I wanted to print the line number of file1, file2, file3, but only continuing each after pressing Mar 15, 2024 · In bash scripting, where precision and efficiency reign supreme, mastering the art of timing can make all the difference between success and failure. This concise guide reveals how to control script execution with precision and ease, enhancing your command line skills. , the file doesn’t exist), the script sleeps for one second using sleep 1 within the while loop and rechecks the conditional expression. 5 days ago · At its simplest, sleep 10 & wait starts a 10-second timer in the background, then immediately waits for it to finish before continuing. Rather than type the same set of instructions into your script Oct 6, 2009 · How do I iterate through each line of a text file with Bash? With this script: echo "Start!" for p in (peptides. If the conditional expression is true (i. Feb 20, 2020 · Sleep is a command-line utility that allows you to suspends the calling process for a specified time. The file runs a for loop to submit jobs. 1m times May 28, 2024 · The bash continue statement is used within loops to skip the current iteration of the loop before the loop starts over again. If you'd like to be more specific, you could save the PID for each background job and wait PID directly before run_step2 inside the second loop. What am I doing incorrectly? Apr 20, 2014 · This solution has a while loop that will continue as long as the line you're searching for isn't found in the file. The tasks may be time-consuming, and executing them one by one slows down the process. There are multiple other possibilities, but these are the general ones. This avoids hard-coded sleep times. This guide will walk you through the basics of bash for loops, complete with simple examples to help you get started. Perfect for developers seeking efficiency! Apr 9, 2021 · Which reads "until curl successfully completes the requested transfer, wait 5 seconds and retry". Is there a way to get job ID of the job just started and wait until it is done and then submit the next job? I tried using wait command but somehow could not extract job ID. Dec 2, 2008 · Hello. Jan 20, 2020 · Use option -w or --wait to setsid so that the setsid command waits until the python process ends before ending itself. Learn how to use the wait command in Linux bash shell to pause script execution until specified background processes or jobs complete, with examples and options. The following menu breaks the features up into categories, noting which features were inspired by other shells and which are specific to Bash. I have created a loop to read through a . Unfortunately this one loops only when a key is pressed. We can execute each iteration as a background process. The 'until' loop is a unique looping mechanism that runs a block of code repeatedly until a specified condition becomes true. This means the shell wait command now has child processes to wait for. Note also that the question that you link to asks about checking the exit status of the background jobs Aug 23, 2020 · For example, bash yourscript < /foo/bar will wait for user input, this is acceptable only when reading passwords. Sep 12, 2024 · 'Bash' provides several looping constructs to control the execution flow in scripts, including 'for', 'while', and 'until' loops. According to the Linux man pages, wait ‘s core functionality includes: Waiting for a specific process ID to terminate Pausing until any launched child processes terminate Blocking until all current child processes have terminated By "child Discover the magic of bash wait. However, given the bash primitives, this is a relatively simple way to avoid going over the process limit, even though it may underutilize the pool. I want to use it in a bash script, so when the host is starting up, the script keeps on pinging and from the moment the host is avail Dec 10, 2017 · How do I tell a script to wait for a process to start accepting requests on a port? Bash wait for process start Shell script to process service restart procedure How do I wait on a program started in another shell These all seem to follow the same basic approach - use a loop to wait until the desired condition is met. Will the commands execute sequentially or paral Aug 18, 2025 · Loops are essential for any scripting language. Nov 7, 2015 · command1 & command2 & wait command 3 This obviously starts two commands in background and, after BOTH are finished, it starts the command 3 Now here there's my for loop script: Aug 19, 2020 · As described in BashFAQ #24, this is caused by your pipeline causing the while loop to be performed in a different shell from the rest of your script. These loops enable us to execute a block of code repeatedly, provided that a specified condition is true. Oct 13, 2017 · 0 I want to create a for loop where I always call N functions simultaneously. May 26, 2023 · Explains how to sleep bash script using the sleep command under Linux / UNIX / BSD / Apple OS X to add delay for a specified amount of time. Oct 30, 2023 · What if we could introduce parallelism into our Bash scripts and workflows using a simple construct that you already know – the for loop? In this comprehensive guide, we‘ll explore how to leverage Bash for loops to run jobs in parallel for faster and more efficient workflows. This article will discuss how to create infinite loops using ‘for’ and ‘while’ constructs in shell scripting, along with practical examples. 1 done # Do something when the process has started your-commands-here You need to adjust the delay, so that it "catches" the process you run. Jun 15, 2025 · 15 Bash Commands for Parallel Processing & Multi-Threading add parallelism to your Bash scripts and save hours without over complicating your scripts 1. For example, run echo command 5 times or read text file line by line or evaluate the options passed on the command line for a script. The control loop statements (break and continue) combine logically with conditional statements such as if elif else to create special situations inside loops. Jul 29, 2021 · The bash WAIT command is used to halt the execution of a script until all background jobs or specified JobID/PIDs terminate successfully and return an expected exit code to trigger the next command that was “waited for. Mar 6, 2024 · Once all the commands were issued and are running in the background, you may wait for all of them to finish by using the the wait command, which is described as: If the wait utility is invoked with no operands, it shall wait until all process IDs known to the invoking shell have terminated and exit with a zero exit status. Parallel bash with wait 20 August 2022 Parallel processing in bash is easy with the wait command. Any suggestions? I'm working on a shell script that does certain changes on a txt file only if it does exist, however this test loop doesn't work, I wonder why? Thank you! while [ ! -f /tmp/list. This guide unveils essential techniques for mastering command-line multitasking. As you say in the question comments, bash on its own isn't really suitable for managing concurrency. Feb 22, 2024 · In this article, we explored parallelization in Bash, starting with background processes using & and wait. Learn how to parallelize a for loop in Bash in 3 easy steps. Whether you’re executing long-running Git commands or automating tasks, knowing how to handle background jobs will improve your productivity and script reliability. " every 10 seconds or so, and wait until the server starts to respond. Feb 3, 2025 · Learn how to use the Bash Wait Command effectively. Sep 12, 2019 · Yes, it's enough to use a single wait with no arguments at the end to wait for all background jobs to terminate. I would like to know if there is any way to wait for any A comprehensive guide to looping in Bash, including for loops, while loops, and more. Continue to help good content that is interesting, well-researched, and useful, rise to the top! To gain full voting privileges, Dec 15, 2021 · The for loop is an essential programming functionality that goes through a list of elements. Jun 28, 2018 · I want to exit the script if any key is pressed. Dec 4, 2023 · In Bash, you can create a loop using the 'for', 'while', or 'until' keywords. But somehow it does not wait Bash contains features that appear in other popular shells, and some features that only appear in Bash. Learn for, while and until loops with examples in this chapter of Bash Beginner Series. Mar 17, 2024 · In Bash scripting, how to parallelly execute multiple task using the "for" loop for efficient task handling and resource management. Notably, we can adjust the sleep duration as we need. txt and once it is found the program will cease, otherwise I want the program to be in a sleep (suspended) state until the file is located. Mar 11, 2025 · In this tutorial, we will explore how to effectively wait for background processes in Bash, ensuring that your scripts run smoothly and efficiently. Instead of waiting until the end condition, a break statement helps exit from a loop before the end condition happens. You could program this parallel execution in a shell, but it's hard, as you've noticed. 5, achieving this Jan 31, 2025 · Explains how to use a Bash for loop control flow statement on Linux / UNIX / *BSD / macOS bash shell with various programming examples. Nov 2, 2021 · kubectl wait --for=condition=Ready pod/busybox1 This way your script will pause until specified pod is Running, and kubectl will output <pod-name> condition met to STDOUT. May 10, 2021 · 4 Bash executes foreground processes in a synchronous way. bash wait. For example, copying a big file, opening a big tar file. Mar 24, 2022 · A very important thing to do, is to wait for each loop to be concluded, thats why I added a file in which all the PID are stored and then I use the wait function to wait for each of them. This guide covers setting up Bash and details each loop with syntax, examples, and tips, ideal for developers and system admins to efficiently automate tasks and manage files. #!/bin/bash while true; do do_something && wait done This will execute over and over until bash receives a signal to terminate the process. PROBLEM: I need the loop to execute the first two lines from the txt in parallel, wait for them to I'm trying to say to Bash , wait for a Process Start / Begin. But while this looks simple at first Feb 7, 2014 · I have only found how to wait for user input. GNU May 15, 2016 · I'd like to wait for keypress and exit when pressed the letter q. sh: Jan 26, 2022 · In Bash scripting, a break statement helps provide control inside loop statements. Understanding how to use loops effectively in Bash can significantly enhance your scripting abilities. Jun 19, 2016 · 25 I don't like using wait because it gets blocked until the process exits, which is not ideal when there are multiple process to wait on as I can't get a status update until the current process is done. Dec 20, 2024 · Below is a simple Bash script that demonstrates how to initiate a background process, captures its PID, and waits for its completion before executing further commands. while :; do sleep 1m & some-command; wait; done there will still be a tiny amount of drift due to bash's time to run the loop structure and the sleep command to actually execute. Enter the bash wait command, which allows scriptwriters to control the flow of processes, ensuring that each task is executed at the right moment. Consequently, none of them do complete, and they wait indefinitely. Mar 12, 2024 · The bash while loop is a control flow statement that allows code or commands to be executed repeatedly based on a given condition. We describe its many variants so you can use them successfully in your own Linux scripts. While it can significantly reduce the amount of time a task takes, it can cause a lot of … Bash for loops are powerful tools in shell scripting that allow you to execute a sequence of commands repeatedly. This can be resolved by not piping to while read, but instead redirecting its input in a way that doesn't Oct 16, 2019 · How to retry a bash command until its status is ok or until a timeout is reached? My best shot (I'm looking for something simpler): Apr 27, 2015 · I have a similar issue. #!/bin/sh while true; do df -h | head sleep 10 clear done Any suggestion? Aug 4, 2011 · First post - great site. The command helps repeat processes until a terminating condition. I tried pause(1), but it says -bash Discover how to bash wait for command to finish effectively. In this comprehensive guide, we will dive deep […] Jan 7, 2023 · Introduction How to run a shell script for 5 minutes in a bash while loop? linux sleep. I could a How to create a loop in bash that is waiting for a webserver to respond? It should print a ". Jul 20, 2023 · Learn to use the until loop in bash with these practical examples in this bash tutorial. bash script for loop. When a certain string is written to the log file, I want to quit the monitoring, and continue with the rest of my script. These loops are powerful tools that can automate repetitive tasks in your scripts. Ideal Oct 30, 2023 · If you need to pause your Bash script and synchronize its execution with a running process or job, the wait command is exactly what you need. The requirement for globbing is not an obstacle: there are make implementations that support it. I am trying to create a script which will start many background command. This guide will help you improve performance and speed up your scripts by running them on multiple cores. In this Jan 26, 2021 · wait is a command that waits for the given jobs to complete and returns the exit status of the waited for command. Maybe I'm not searching for the Nov 13, 2024 · Loops are a fundamental concept in programming that allows you to execute a block of code multiple times. You have no instance of this in the code that you show. Either a counter reaches a predefined number, or the user manually forces the script to continue with whatever the value the counter currentl Mar 31, 2024 · In Bash, the sleep command in combination with a while loop executes a series of statements repeatedly with a specified time interval. script timer. For each background command I need to get the return code. This tutorial shows A makefile is a good solution to your problem. They do not depend on each other, I simply want to kind of run this loop in parallel. Note: you will need "parallel" from the GNU parallel project (sudo apt-get install parallel). If no process ID is Aug 23, 2018 · Shouldn't it be the other way around, while instead of until? You might never see that string if the command finishes fast, and you want to wait while it runs, not until it does. I hope you can help. Understand how Bash scripts wait for commands to finish and optimize execution time. Not sure how I would script it. Moreover, while loops are versatile in that we can include user input as the specified condition, allowing a defined script to behave dynamically based on user input. In this tutorial, we will show you how to use the Linux sleep command. Obviously you could set this to whatever you want. How to loop a function to run for certain minutes and then exit? How to run a command in a shell script for few minutes and exit? Sep 19, 2023 · Learn how to efficiently wait for a file in Bash scripts, with a timeout feature for added resilience. To do it as you want, you have to launch the process in the background using &, as pointed out in the comments. 1. Of course, issues can exist even in the simplest of programs. For each of those elements, the for loop performs a set of commands. A loop is a section of code that you want to have executed repeatedly. Usually in the form of ctrl+c. org > Forums > Non-*NIX Forums > Programming [SOLVED] bash how to wait in script from the previous command to finish Programming This forum is for all programming questions. Whether you’re automating tasks, managing files, or processing data, mastering for loops can significantly enhance your scripting capabilities. By suspending the script until a specified process completes, wait enables you to coordinate sequenced tasks and ensure proper flow control. The question does not have to be directly related to Linux and any language is fair game. Usage of Bash wait Command The basic syntax of wait command is as follows ? wait [n] Here, 'n' is process ID of background process that we want to wait for. For example if you forget to write sudo in front of a command, you can simply do sudo !! to run the previous command with root privileges. Master the art of automation with our guide on bash wait for file to exist. for i in {1. txt and execute another shell using each line as input. -f makes curl fail on server errors, -s prevents it from printing messages and the progress meter, -o /dev/null assumes you are not interested in the content of the response. May 19, 2017 · Syntax for a single-line while loop in Bash Asked 16 years, 3 months ago Modified 2 years, 6 months ago Viewed 1. I am using tail -f to monitor a log file that is being actively written to. When the file is created, the conditional expression becomes false. For example to await a copy: rsync files & wait $! ls files # guaranteed file sync finished Waiting on background process IDs gives flexibility since durations adapt automatically. In this blog post, we will delve into how the bash wait command plays a pivotal role in scripting. I need to write an infinite loop that stops when any key is pressed. Or you can use wait (" man wait "): launch several child processes, call wait - it will exit when the child processes finish. Then we looked at xargs and for loops to improve parallel execution. It should be noted that the bash continue statement can only be used in for, while, and until loops. This of course works best if it should detect a service that doesn't stop again Aug 2, 2023 · This guide shows how to use the Bash until loop through various practical and hands-on examples of Bash scripts incorporating the feature. I want to write wait until a file exists in bash. Oct 26, 2021 · Basics: Create a background process in bash If you run a command in your Bash terminal, you will have to wait for it to complete, before running your next command. The simple approach would be to just insert a wait in between your two loops. Apr 8, 2020 · Bash script to loop and wait for a server to start using curl with timeout and maximum iteration controls for CI pipelines. This means that Bash shell will pause execution until specified process has completed. Update, this code tests if I ge Jun 28, 2021 · You are probably asking the wrong question. Jun 27, 2017 · Why is the while loop only performed twice like once with ping failing and once with ping succeeding? What do I have to change to get more dots added in the while loop? Mar 18, 2024 · Then, it checks the existence of the file using the conditional expression [ ! –e $ {file_to_wait} ] in a while loop. Is there any builtin feature in Bash to wait for a process to finish? The wait command only allows one to wait for child processes to finish. It is a bash trick to run the previous command. In this article, I will show you 6 1 day ago · In system administration and automation, there are often scenarios where you need to pause a task until the system’s CPU usage drops below a certain threshold. Oct 30, 2023 · The versatile Bash for loop does much more than loop around a set number of times. In Bash scripting, loops are particularly powerful for automating repetitive tasks, managing files, processing data, and more. Apr 12, 2023 · What is Bash wait Command? The wait command is a built-in Bash shell command that waits for termination of a background process. txt) to appear in the /tmp directory and once it's found to stop the program, otherwise to sleep the file until it's located So far I have: if [ ! Apr 3, 2014 · I have a Bash script with a for loop, and I want to sleep for X seconds. The script prints that the Sep 24, 2025 · Learn bash increment variable syntax for counters. Some of the shells that Bash has borrowed concepts from are the Bourne Shell (sh), the Korn Shell (ksh), and the C-shell (csh and its successor, tcsh). May 16, 2024 · The while loop in Bash enables us to iterate tasks continuously. In your bash script you can toss a bunch of work into background processes with & and instead of exiting, calling wait will hang until they all complete: Mar 15, 2024 · In bash scripting, where precision and efficiency reign supreme, mastering the art of timing can make all the difference between success and failure. I'm looking for a way to make my bash shell script stop at certain steps, and continue when a key is pressed. Jul 21, 2025 · When we write Bash scripts, we often need to perform repetitive tasks, such as processing files, making requests, or handling data in a loop. Compatible with Bash 3 and newer versions. Method 1: (probably the better choice) Create a loop that pings a server until reply is received then execute co Nov 30, 2019 · In shell script how to create the script that wait and check a particular program running or not if running then wait till dead, after death of the program that script will show the msg that now y Mar 18, 2017 · LinuxQuestions. 8} Aug 18, 2025 · Loops are essential for any scripting language. How do I do this? I tried this but it doesnt work: Apr 21, 2022 · Learn how to use loops in Bash to control the flow of your programs. This tutorial teaches you how to Sep 1, 2008 · 12 Instead of a plain bash, use a Makefile, then specify number of simultaneous jobs with make -jX where X is the number of jobs to run at once. Feb 17, 2015 · I'm trying to write a shell script that will wait for a file to appear in the /tmp directory called sleep. Master autoincrement operators, loop counters, and arithmetic operations with examples. The answer by @GordonDavisson is preferable for all other uses. May 25, 2023 · I need a script that will wait for a (examplefile. gmlpmw bssr qcbhbh ibqodqg bkfcev vrd nulf qszv mahv cdmj noktq ozo myjj yhg tusvi