I recently learned that cron jobs in Mac OS terminal will not run if the computer is off/asleep.
I had always assumed that cron jobs run regardless of whether the machine is on or off.
I have a crontab (with a couple python scripts) on linux (ubuntu) that is running on AWS (an EC2 instance). Will my cron jobs will run regardless of whether my computer is on or off? I've always thought yes, because the crontab is running on the cloud (AWS) and not my local machine. But now I'm not so sure.
Yes, contab jobs should run if the computer their setup on is running.
If you SSH from your laptop into a VM and setup a crontab job on the VM properly then it should run as long as the VM is on and running even if your laptop is off.
You should be able to test this using a simple script that creates a file (or something similar) set to 5 minutes in the future then quickly turn off your laptop and check again in 10 minutes. If you have things setup correctly then when you check the script will have created the file (or whatever you set it to do). If this works then you can continue confidently. If it doesn't work (the file didn't appear) then something is wrong with how the crontab job was set up.
Related
I regularly have Python scripts that take up to 8+ hours to complete that I want to run on a remote server. However, I don't want to go through the hassle of setting up a server, setting an environment, running the script and shutting down the server after the script is done every time.
Ideally, I'm looking for a CLI product like Heroku that spins up a server, runs the script in an environment and shuts down the server after the script is done.
AWS Lambda functions sound close to what I'm looking for, but they have a runtime limit. Are there other solutions that would fit these criteria?
Thanks!
I have a project in which one of the tests consists of running a process indefinitely in order to collect data on the program execution.
It's a Python script that runs locally on a Linux machine, but I'd like for other people in my team to have access to it as well because there are specific moments where the process needs to be restarted.
Is there a way to set up a workflow on this machine that when dispatched, stops and restarts the process?
You can execute commands on your Linux host via GH Actions and SSH. Take a look at this action.
I currently have a cmd script set up on my computer in conjunction with a scheduled task that's supposed to run every 15 minutes. The script runs a python program that is also on my computer and then uploads the file that's created to my Github repository. However, this scheduled task doesn't run when my computer is completely shut down and I don't want to have my computer on 24/7.
Is there a way to run a cmd script with my computer off? I've heard of potential solutions with an Amazon Web Services account or a DigitalOcean droplet, but I'm novice (at best) with my understanding of how that works. Any suggestions or links to resources would be appreciated!
There's no way to run anything on your computer with it powered off.
You could set up a low-cost Linux VPS with any cloud compute provider (AWS, DigitalOcean, Microsoft Azure, Google Cloud Platform, Vultr, etc.), migrate your python program to it, and schedule that program to run every 15 minutes on there.
DigitalOcean: How to set up an Ubuntu 20.04 server
You would need to keep that VPS turned on, and in place of Task Scheduler, you could schedule your Python program to run (with any arguments) as a cron job.
DigitalOcean: How to use Cron to automate tasks
I have coded a Python Script for Twitter Automation using Tweepy. Now, when i run on my own Linux Machine as python file.py The file runs successfully and it keeps on running because i have specified repeated Tasks inside the Script and I also don't want to stop the script either. But as it is on my Local Machine, the script might get stopped when my Internet Connection is off or at Night. So i couldn't keep running the Script Whole day on my PC..
So is there any way or website or Method where i could deploy my Script and make it Execute forever there ? I have heard about CRON JOBS before in Cpanel which can Help repeated Tasks but here in my case i want to keep running my Script on the Machine till i don't close the script .
Are their any such solutions. Because most of twitter bots i see are running forever, meaning their Script is getting executed somewhere 24x7 . This is what i want to know, How is that Task possible?
As mentioned by Jon and Vincent, it's better to run the code from a cloud service. But either way, I think what you're looking for is what to put into the terminal to run the code even after you close the terminal. This is what worked for me:
nohup python code.py &
You can add a systemd .service file, which can have the added benefit of:
logging (compressed logs at a central place, or over network to a log server)
disallowing access to /tmp and /home-directories
restarting the service if it fails
starting the service at boot
setting capabilities (ref setcap/getcap), disallowing file access if the process only needs network access, for instance
I have set up a python script to run daily from my pc by adding it to the start up section in Windows 7.
However, does any know how I can set up a job (probably from Task Scheduler) to alert me if the program has stopped running i.e. if for some reason the cmd screen is closed etc... so that I can restart it or automatically restart it
Mike
To me it sounds like what you actually are looking for is windows services.
About services
If you don't know what a windows service is, then msdn have some documentation about it.
Creating a windows service in python
For a concrete example on how to do this in python, go here