Linux Café

Introduction to systemd Service Restart Behavior

I’ve seen this go wrong when working with systemd services: a service restarts repeatedly, causing issues with your system’s stability and performance. The real trick is to understand how to tame this behavior using two key parameters: StartLimitBurst and StartLimitInterval.

Understanding StartLimitBurst and StartLimitInterval

These two settings are related and determine how often a systemd service can restart within a given time frame. StartLimitBurst specifies the maximum number of restarts allowed within the StartLimitInterval time period. If the service restarts more times than specified by StartLimitBurst within the StartLimitInterval, it will be placed in a failed state and will not be restarted again.

Introduction to System Load Spikes

I’ve had my fair share of system load spikes on my home server over the years. These spikes can be caused by resource-intensive applications, misconfigured services, or even malware. I recall one particularly nasty spike that brought my server to its knees - it was a real wake-up call. Since then, I’ve been exploring ways to manage system load on my Linux home server. In this article, I’ll share my experiences with using nice, ionice, and cgroups to tame these spikes.

Introduction to the Problem

I’ve seen this go wrong when you’re trying to remove unnecessary packages from your system - accidentally removing systemd can be a real headache. As of 2026, systemd has become an essential part of many Linux distributions, including Debian, Arch Linux, and OpenSUSE. It’s responsible for managing system services, boot processes, and system states. If you’ve found yourself in this situation, don’t worry, it’s recoverable. In this article, we’ll walk through the steps to recover from a failed boot after removing systemd.

Introduction to Background Tasks

As someone who’s spent years running a homelab, I’ve learned that managing background tasks can be a real challenge. You’ve got scripts and commands that need to keep running, even after you’ve logged out of your system. In my experience, nohup and systemd have been the two most useful tools for getting this done.

What is nohup?

nohup is a simple command that lets you run a process in the background, ignoring the SIGHUP signal that’s sent when the controlling terminal closes. This means you can start a process with nohup, log out, and the process will just keep on running. Here’s an example:

Introduction to Disk Space Reclamation

I’ve lost count of how many times I’ve run into issues with package managers leaving behind unnecessary files on my Linux systems. This can happen due to incomplete package removals, failed updates, or simply because the package manager didn’t clean up after itself. In my experience, this is more common than you’d think, especially when using less popular packages or experimenting with different distributions.

Identifying the Problem

To start reclaiming disk space, you first need to identify where the unnecessary files are located. A good starting point is to use the find command, which allows you to search for files based on various criteria such as size, modification time, and permissions. For example, to find all files larger than 100MB in the /usr directory, you can use the following command:

Introduction to Log Management

As a Linux user, you’re probably familiar with the importance of logs. I’ve seen this go wrong when trying to debug an issue or monitor system performance - duplicate logs can be overwhelming. In this article, we’ll explore how to remove duplicates using uniq, sort, and jq.

Understanding the Problem

Duplicate logs can come from multiple sources: multiple instances of the same service, redundant logging mechanisms, or simple configuration mistakes. The real trick is to identify the cause and develop a strategy for removing duplicates. Don’t bother with trying to manually sift through logs - that’s a surefire way to waste time and miss important trends.

Introduction to CPU Usage Spikes

I’ve had my fair share of CPU usage spikes on my home server, and I’ve learned that they can be caused by a variety of factors, including resource-intensive applications, misconfigured services, or even malware. The real trick is to identify the root cause of the spike and take corrective action. In my experience, using systemd and ps can be a powerful way to manage CPU usage spikes.

Introduction to External Drive Management

I’ve been using Linux for years, and one thing that’s always been a bit of a pain is managing external drives. Whether it’s a USB flash drive, an external hard drive, or an SSD, keeping track of these devices can be a chore. I’ve seen this go wrong when you’ve got multiple drives connected and you’re not sure which one is which. In practice, this can lead to a lot of confusion and wasted time. That’s why I’ve started using udev rules and automounting to manage my external drives.

Introduction to Apt Pinning

I’ve seen this go wrong when you’re managing a small Debian server and dependencies become a challenge. That’s where apt pinning comes in – a feature that lets you control the version of packages installed on your system. On Debian-based systems, apt is the package manager of choice, providing a robust way to manage dependencies and install software. However, when you need to ensure a specific package version is used, apt pinning is your friend.

Introduction to My Linux Migration

I’ve been an Ubuntu user for years, but after the 2025 release, I figured it was time to try something new. Fedora’s been on my radar, and as someone who’s always tinkering with Linux, I thought, why not? In this article, I’ll share my experience of ditching Ubuntu for Fedora on my laptop, including the tweaks and surprises I encountered along the way.

Preparing for the Migration

Before making the switch, I backed up all my important files using rsync to an external hard drive - don’t bother with anything less, you never know when you’ll need it. I also made a list of the packages I had installed on Ubuntu, so I could easily reinstall them on Fedora. To get a feel for the Fedora environment, I created a virtual machine using virt-manager and played around with the distribution before committing to a full installation. This is where people usually get burned, so take your time and test things out.