Start Service in Red Hat Enterprise Linux 8: Tech Support Guide
In this comprehensive guide, we'll cover the process of starting services on Red Hat Enterprise Linux 8 (RHEL8). Specifically, we will address a common issue when setting services to run under a specified user.
Prerequisites
First, let's ensure you have the necessary prerequisites:
- A system running RHEL8
- A user with
sudoprivileges - Familiarity with editing text files using a tool like
viornano
Issue: Setting Services to Run Under a Specific User
Suppose you encounter an issue where you've created a small shell script (/home/d608771/my_service.sh) and set the file permissions:
However, the service fails to start with the following error:
Solution
In RHEL8, systemd manages services. You'll need to create a .service file to start your script with a specific user.
Follow these steps:
- Create a
.servicefile in the/etc/systemd/systemdirectory: - Reload the systemd daemon:
- Enable and start the new service:
Now, your service should start without issues.
Understanding the Solution
The solution consists of creating a .service file for your script. This file contains essential attributes for systemd to manage your script properly:
User: specifies the user that runs the scriptGroup: specifies the user's groupExecStart: sets the script path that will be executed
Once you've created this file, reloading the systemd daemon and enabling the service ensures it starts at boot.