Systemd: setup a simple systemd service on Linux
Systemd gives us the ability to create services out of almost anything. If you want to run an application and make sure that the application is available after a reboot, consider creating a service to manage that for you.
This GIST contains all the command:
https://gist.github.com/dmccuk/0452da...
In this Demo, I’ll cover the following:
• Create a simple bash script to output the date to a log file.
• Setup the basic systemd service unit file.
• Reload systemd to pick up the new service.
• Enable, then start the service.
• Stop and restart the service.
• Test it with a server reboot.
There’s no documentation link for this. Please use google to search for anything specific. There are a lot of options available to you may need to add some like the user/group depending on the requirements of your application.
All the commands and code used in the demo are below
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COMMANDS:
vi simple_service.sh
*** NOTE: the cheveron symbol isn't allowed in the description! Replace "chevron" below with the greater-than/redirect symbol. ***
#!/bin/bash
for i in {1..100}
do
echo $i "- " `date` Chevron /tmp/simple.log
sleep 5
done
Sudo or root access for this section.
As root:
vi /etc/systemd/system/simple.service
[Unit]
Description=service to check the time
After=network.target
[Service]
ExecStart=/bin/bash /home/ec2-user/how2/simple_service/simple_service.sh
[Install]
WantedBy=multi-user.target
Then run these commands:
systemctl daemon-reload
systemctl start simple.service
systemctl enable simple.service
systemctl status simple.service
Tail the log file. Is it working?
Reboot the server.
Check if it's working?
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