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-\documentclass[12pt]{beamer}
-\usetheme{metropolis}
-
-\newenvironment{code}{\ttfamily}{\par}
-
-\title{systemd}
-\subtitle{The standard Linux init system}
-
-\begin{document}
-\metroset{titleformat frame=smallcaps}
-
-\maketitle
-
-\section{Introduction}
-
-\begin{frame}{What is an init system?}
-  An init system is the first userspace process (PID 1) started in a UNIX-like system. It handles:
-
-  \begin{itemize}
-  \item Starting system processes and services to prepare the environment
-  \item Adopting and ``reaping'' orphaned processes
-  \end{itemize}
-\end{frame}
-
-\begin{frame}{Classical init systems}
-  Init systems before systemd - such as SysVinit - were very simple.
-
-  \begin{itemize}
-  \item Services and processes to run are organised into ``init scripts''
-  \item Scripts are linked to specific runlevels
-  \item Init system is configured to boot into a runlevel
-  \end{itemize}
-
-\end{frame}
-
-\section{systemd}
-
-\begin{frame}{Can we do better?}
-  \begin{itemize}
-  \item ``legacy'' init systems have a lot of drawbacks
-  \item Apple is taking a different approach on OS X
-  \item Systemd project was founded to address these issues
-  \end{itemize}
-\end{frame}
-
-\begin{frame}{Systemd design goals}
-  \begin{itemize}
-  \item Expressing service dependencies
-  \item Monitoring service status
-  \item Enable parallel service startups
-  \item Ease of use
-  \end{itemize}
-\end{frame}
-
-\begin{frame}{Systemd - the basics}
-  \begin{itemize}
-  \item No scripts are executed, only declarative units
-  \item Units have explicit dependencies
-  \item Processes are supervised
-  \item cgroups are utilised to apply resource limits
-  \item Service logs are managed and centrally queryable
-  \item Much more!
-  \end{itemize}
-\end{frame}
-
-\begin{frame}{Systemd units}
-  Units specify how and what to start. Several types exist:
-  \begin{code}
-    \small
-    \begin{columns}[T,onlytextwidth]
-      \column{0.5\textwidth}
-      \begin{itemize}
-      \item systemd.service
-      \item systemd.target
-      \item systemd.timer
-      \item systemd.path
-      \item systemd.socket
-      \end{itemize}
-      \column{0.5\textwidth}
-      \begin{itemize}
-      \item systemd.device
-      \item systemd.mount
-      \item systemd.swap
-      \item systemd.slice
-      \end{itemize}
-    \end{columns}
-  \end{code}
-\end{frame}
-
-
-\begin{frame}{Resource management}
-  Systemd utilises Linux \texttt{cgroups} for resource management, specifically CPU, disk I/O and memory usage.
-
-  \begin{itemize}
-  \item Hierarchical setup of groups makes it easy to limit resources for a set of services
-  \item Units can be attached to a \texttt{systemd.slice} for controlling resources for a group of services
-  \item Resource limits can also be specified directly in the unit
-  \end{itemize}
-\end{frame}
-
-\begin{frame}{journald}
-  Systemd comes with an integrated log management solution, replacing software such as \texttt{syslog-ng}.
-  \begin{itemize}
-  \item All process output is collected in the journal
-  \item \texttt{journalctl} tool provides many options for querying and tailing logs
-  \item Children of processes automatically log to the journal as well
-  \item \textbf{Caveat:} Hard to learn initially
-  \end{itemize}
-\end{frame}
-
-\begin{frame}{Systemd tooling}
-  A variety of CLI-tools exist for managing systemd systems.
-  \begin{code}
-    \begin{itemize}
-    \item systemctl
-    \item journalctl
-    \item systemd-analyze
-    \item systemd-cgtop
-    \item systemd-cgls
-    \end{itemize}
-  \end{code}
-
-  Let's look at some of them.
-\end{frame}
-
-\section{Demo}
-
-\section{Controversies}
-
-\begin{frame}{Systemd criticism}
-  Systemd has been heavily criticised, usually focusing around a few points:
-  \begin{itemize}
-  \item Feature-creep: Systemd absorbs more and more other services
-  \end{itemize}
-\end{frame}
-
-\begin{frame}{Systemd criticism}
-  \includegraphics[keepaspectratio=true,width=\textwidth]{systemdcomponents.png}
-\end{frame}
-
-\begin{frame}{Systemd criticism}
-  Systemd has been heavily criticised, usually focusing around a few points:
-  \begin{itemize}
-  \item Feature-creep: Systemd absorbs more and more other services
-  \item Opaque: systemd's inner workings are harder to understand than old \texttt{init}
-  \item Unstable: development is quick and breakage happens
-  \end{itemize}
-\end{frame}
-
-\begin{frame}{Systemd adoption}
-  Systemd was initially adopted by RedHat (and related distributions).
-
-  It spread quickly to others, for example ArchLinux.
-
-  Debian and Ubuntu were the last major players who decided to adopt it, but not without drama.
-\end{frame}
-
-\section{Questions?}
-
-\end{document}