Tags: systemd


This installment of our systemd series covers how to create a unit that starts a service when something changes in the filesystem.

Systemd Services: Monitoring Files and Directories

So far in this systemd multi-part tutorial, we’ve covered how to start and stop a service by hand, how to start a service when booting your OS and have it stop on power down, and how to boot a service when a certain device is detected. This installment does something different yet again and covers...
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Devuan 2.0 Is a Debian Fork for Linux Users Who Want to Avoid systemd

Devuan is a fork of Debian that eschews the Red Hat-developed systemd init system in favor of alternatives such as sysvinit, among others. Unlike the Mir vs. Wayland controversy, the use of systemd has impacted enterprise servers, which have highly customized init scripts that are challenging to...
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Paul Brown shows how to use systemd to start and stop a USB webcam as a simple surveillance system.

Systemd Services: Reacting to Change

I have one of these Compute Sticks (Figure 1) and use it as an all-purpose server. It is inconspicuous and silent and, as it is built around an x86 architecture, I don't have problems getting it to work with drivers for my printer, and that’s what it does most days: it interfaces with the shared...
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Paul Brown shows how to use systemd to run a server for games, web applications, or other purposes. Image courtesy: Minetest

Systemd Services: Beyond Starting and Stopping

In the previous article, we showed how to create a systemd service that you can run as a regular user to start and stop your game server. As it stands, however, your service is still not much better than running the server directly. Let's jazz it up a bit by having it send out emails to the players...
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Learn how to make simple systemd services to manage your own game server.

Writing Systemd Services for Fun and Profit

Let's say you want to run a games server, a server that runs Minetest, a very cool and open source mining and crafting sandbox game. You want to set it up for your school or friends and have it running on a server in your living room. Because, you know, if that’s good enough for the kernel mailing...
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How to Control Systemd Services on Remote Linux Server

Systemd system and services manager can be controlled using the systemctl command line utility. It enables you to manage systemd locally or on a remote Linux machine over the SSH protocol. In this short article, we will show you how to manage systemd system and service manager on a remote Linux...
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Containing System Services in Red Hat Enterprise Linux – Part 1

At the 2017 Red Hat Summit, several people asked me “We normally use full VMs to separate network services like DNS and DHCP, can we use containers instead?”. The answer is yes, and here’s an example of how to create a system container in Red Hat Enterprise Linux 7 today.    The Goal Create a...
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An Introduction to the Linux Boot and Startup Processes

Understanding the Linux boot and startup processes is important to being able to both configure Linux and to resolving startup issues. This article presents an overview of the bootup sequence using the GRUB2 bootloader and the startup sequence as performed by the systemd initialization system. In...
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This article will give you a taste of the tools systemd offers for system administration.

5 systemd Tools You Should Start Using Now

Once you get over systemd's rude departure from the plain-text, script-laden System V of yore, it turns out to be quite nifty and comes with an equally nifty toolbox. In this article, we'll be looking at four of those tools, plus one you're probably already familiar with but haven't used in the way...
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Mitigating dirtyc0w with systemd

Basic mitigation Known exploits for the CVE-2016–5195 vulnerability involve the madvise syscall, so it’s possible to mitigate by excluding the necessary call via a systemd service or container configuration. This is easy with for a systemd unit: [Service] SystemCallFilter=~madviseThe tilde after...
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