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How to run or repeat a Linux command every x seconds?
If you are new to bash scripting, you can check our guide about bash loops here. In case this is the first time you hear about the “sleep” command, it is used to delay something for a specified amount of time. In scripts, you can use it to tell your script to run command 1, wait for 10 seconds and then run command 2.
How to retry a Bash command until its status is OK?
How to retry a bash command until its status is ok or until a timeout is reached? You can simplify things a bit by putting command right in the test and doing increments a bit differently.
How to retry a function in bash script?
if you want to retry an function in your script, you should do like this: # example usage: foo () { #whatever you want do. } declare -fxr foo retry 3 timeout 60 bash -ce ‘foo’
How to run a command on a Linux system?
If you want to run a command on a Linux system until it succeeds, there are some really easy ways to do it that don’t require you to retype the command repeatedly or sit in front of your screen pressing !! (repeat the previous command) until the command works. In this post, we’ll look at two options available with bash.
How to use Bash to repeat a command?
First, open your .bash_aliases file: Et voilà ! You can now use it like this: $ repeat 5 echo Hello World !!! you can use crontab. run the command crontab -e and open it with your preferred text editor, then add this line X number of times to repeat. Y time to wait to repeat.
Is it possible to run Bash function every x minute?
It seems you’re not allowed to use cron. In that case, you could use an infinite loop calls this function in the background and then sleeps for x minutes: Just make sure to sleep long enough so that the current speedtest call terminates before the sleep is over, to avoid multiple instances of the process running in parallel.
How often should I run the Speedtest function in Bash?
I have a bash script with a function named speedtest created like this: I would like to run this function exactly x minutes. Note that the function takes some time to run. If I run it every x minutes, that’s not the same thing as running it, sleeping for x minutes and then running it again. I want to start the function exactly every x minutes.
How many times can I run the ECHO command in Bash?
With the above loops, you can tell bash to run a command, sleep for N amount of seconds and then run the command again. Below you can see examples of both loops: The above one liner, will run the echo command and display the current date, total of 10 times, with 5 seconds sleep between executions.
Why do I need to run the same command multiple times?
The basic goal of a loop is to repeat a task several times, depending upon the value provided for the iterator and the termination condition of the loop. Loops allow programmers to avoid the hassle of repeating processes manually. Suppose that there is a command that you wish to run multiple times.
How to avoid duplicate entries in.bash _ history?
A value of erasedups causes all previous lines matching the current line to be removed from the history list before that line is saved. Any value not in the above list is ignored.
How to execute SP _ execute _ external _ script on Windows?
To execute sp_execute_external_script, you must first install Machine Learning Services or Language Extensions. For more information, see Install SQL Server Machine Learning Services (Python and R) on Windows and Linux, or Install SQL Server Language Extensions on Windows and Linux.
How to watch Unix commands or shell-scripts?
Watch: Repeat Unix Commands or Shell-Scripts every N seconds Example 1: Watching for a file creation using watch ls Example 2: Display used & free memory details (with differences highlighted) Example 3: Display available disk space (repeat every 10 seconds) Example 4: Suppress watch header in the output