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1. LINGON X RUN APP AT SCHEDULED TIME INSTALL
2. LINGON X RUN APP AT SCHEDULED TIME SOFTWARE
3. LINGON X RUN APP AT SCHEDULED TIME SERIES

If you have any questions or would like to share how you use this command, tell us! Leave a comment below.For example, one could have an application (the X client) running on an ARM system, displaying its output on an amd64's graphical display (the X server). I hope that your understanding of the at command has improved. The man page recommends that you change it to higher than n-1 where n is the number of CPUs in your system. Where n is the load threshold you’d like to choose. If you want to change the load threshold, you can do so with the following command: atd -l The method for entering batch jobs is identical to ‘ at‘, except that it does not need a time to be specified. Job 16 at Mon Jan 6 05:42:00 2020 Example 6: Run a job when CPU load drops below a thresholdīatch jobs will be run when the CPU load average drops below 1.5 by default. So now, you can add -f to the ‘at’ command and include the filename after like so: :~$ at now + 2 minutes -f problem_employee_logs.txt You can save yourself time by listing the necessary scripts in a text file executing them with at. You may want certain activity logs or other history information to generate a report for you at specified times. Let’s imagine a scenario where HR requests documentation for computer activity of an employee who they believe is violating work policy. You can input multiple jobs without using the standard input. Maybe you have a set of scripts that you want to run irregularly and cron isn’t the right fit. :~$ atrm 11Īs you can see job 11 has been removed from the queue. If you decide to cancel a job before it is executed, this can be done by typing the command followed by its corresponding job id (that you can get with atq command). You can also view the content of the scheduled job with -c option: at -c jobnumber Example 4: Removing a scheduled job with atrm :~$ atqĮach job is identified by a job ID, its scheduled time, and the associated user. To see all jobs on the system, you may need to use elevated privileges. It will list all currently scheduled jobs for the user who is logged in. Example 3: View all queued jobs with atqĪt any time you can check the scheduled jobs using atq command. Verify at 3:50: :~$ cat message.txtġ0 minutes later. Set up the second job for a specific time (10 mins from now): :~$ at 3:50Īt> echo "10 minutes later." > message.txt Warning: commands will be executed using /bin/shĪt> echo "5 minutes later." > message.txt Set up the first job for a specific time (5 mins from now): :~$ at 3:45 You can check the current time on your Linux system with the date command. Each job will replace the content of the file. You can use the message.txt file (created in previous example) for the demonstration. This time, let’s schedule 2 jobs at different times. This is a great easy way to schedule a job, but you may want to get more specific. Look at you, using at like a champ! Example 2: Using a Specified Time/Dateįor your first job, you used the “relative” time ‘now + ’. Looks good, but did it capture our message properly? Let’s view the content of the file: :~$ cat message.txt You should have a file called ‘message.txt’ containing our text.

So, it’s been about a minute, right? Check the directory for a new file. The vast majority of Linux distributions come with bash as the system shell symlinked as “sh”… It’s a long story. It could potentially cause a headache if you are using a different shell. You can most likely ignore the warning about bin/sh.

Instructs the system to only run the job at the specified time if system load is at a certain level (load average of echo "Look at you, using at like a champ!" > message.txt Lists queued jobs for the logged-in user, or all users if run as sudo I’ve made a table with some of the basic commands associated with at. As I already mentioned, at is preferred for situations where your task is more of a “one-off” than a recurring event.

LINGON X RUN APP AT SCHEDULED TIME SERIES

The ‘at utility’ is actually a series of commands that work together to schedule jobs. If you’re using a different Linux distribution, then you may need to modify this command to reflect the package manager used by your distribution.

LINGON X RUN APP AT SCHEDULED TIME INSTALL

If not, it can be installed on Debian based systems by typing: sudo apt install at

LINGON X RUN APP AT SCHEDULED TIME SOFTWARE

If the software is already installed, this will return the version number. It is not installed by default on all operating systems. Installing at command in Linuxīefore you get started, you should check to see if ‘at’ is installed on your system. In this tutorial, I’ll show how you can use the ‘at command’ to schedule running tasks and commands at a certain time in the future. The at command in Linux can be used to schedule jobs that do not run on a regular schedule.Īt can be compared with the concept of Crontab in Linux, which is a better way for automating recurring tasks.