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---
layout: default
SPDX-License-Identifier: LGPL-2.1-or-later
---
# System and Service Manager
systemd is a suite of basic building blocks for a Linux system. It provides a system and service manager that runs as PID 1 and starts the rest of the system.
systemd provides aggressive parallelization capabilities, uses socket and D-Bus activation for starting services, offers on-demand starting of daemons, keeps track of processes using Linux control groups, maintains mount and automount points, and implements an elaborate transactional dependency-based service control logic. systemd supports SysV and LSB init scripts and works as a replacement for sysvinit.
Other parts include a logging daemon, utilities to control basic system configuration like the hostname, date, locale, maintain a list of logged-in users and running containers and virtual machines, system accounts, runtime directories and settings, and daemons to manage simple network configuration, network time synchronization, log forwarding, and name resolution.
---
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{% assign extra_pages = site.data.extra_pages | group_by:"category" %}
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{% if pair.name != "" %}
## {{ pair.name }}
{% assign sorted = pair.items | sort:"title" %}{% for page in sorted %}
* [{{ page.title }}]({{ page.url | relative_url }}){% endfor %}
{% endif %}
{% endfor %}
## See also
* [Introductory blog story](https://0pointer.de/blog/projects/systemd.html)
* [Three](https://0pointer.de/blog/projects/systemd-update.html) [status](https://0pointer.de/blog/projects/systemd-update-2.html) [updates](https://0pointer.de/blog/projects/systemd-update-3.html)
* The [Wikipedia article](https://en.wikipedia.org/wiki/systemd)
---
<pre class="intro-code-block">
Welcome to <span class="color-blue">Fedora 20 (Heisenbug)</span>!
[ <span class="color-green">OK</span> ] Reached target Remote File Systems.
[ <span class="color-green">OK</span> ] Listening on Delayed Shutdown Socket.
[ <span class="color-green">OK</span> ] Listening on /dev/initctl Compatibility Named Pipe.
[ <span class="color-green">OK</span> ] Reached target Paths.
[ <span class="color-green">OK</span> ] Reached target Encrypted Volumes.
[ <span class="color-green">OK</span> ] Listening on Journal Socket.
Mounting Huge Pages File System...
Mounting POSIX Message Queue File System...
Mounting Debug File System...
Starting Journal Service...
[ <span class="color-green">OK</span> ] Started Journal Service.
Mounting Configuration File System...
Mounting FUSE Control File System...
[ <span class="color-green">OK</span> ] Created slice Root Slice.
[ <span class="color-green">OK</span> ] Created slice User and Session Slice.
[ <span class="color-green">OK</span> ] Created slice System Slice.
[ <span class="color-green">OK</span> ] Reached target Slices.
[ <span class="color-green">OK</span> ] Reached target Swap.
Mounting Temporary Directory...
[ <span class="color-green">OK</span> ] Reached target Local File Systems (Pre).
Starting Load Random Seed...
Starting Load/Save Random Seed...
[ <span class="color-green">OK</span> ] Mounted Huge Pages File System.
[ <span class="color-green">OK</span> ] Mounted POSIX Message Queue File System.
[ <span class="color-green">OK</span> ] Mounted Debug File System.
[ <span class="color-green">OK</span> ] Mounted Configuration File System.
[ <span class="color-green">OK</span> ] Mounted FUSE Control File System.
[ <span class="color-green">OK</span> ] Mounted Temporary Directory.
[ <span class="color-green">OK</span> ] Started Load Random Seed.
[ <span class="color-green">OK</span> ] Started Load/Save Random Seed.
[ <span class="color-green">OK</span> ] Reached target Local File Systems.
Starting Recreate Volatile Files and Directories...
Starting Trigger Flushing of Journal to Persistent Storage...
[ <span class="color-green">OK</span> ] Started Recreate Volatile Files and Directories.
Starting Record System Reboot/Shutdown in UTMP...
[ <span class="color-green">OK</span> ] Started Trigger Flushing of Journal to Persistent Storage.
[ <span class="color-green">OK</span> ] Started Record System Reboot/Shutdown in UTMP.
[ <span class="color-green">OK</span> ] Reached target System Initialization.
[ <span class="color-green">OK</span> ] Reached target Timers.
[ <span class="color-green">OK</span> ] Listening on D-Bus System Message Bus Socket.
[ <span class="color-green">OK</span> ] Reached target Sockets.
[ <span class="color-green">OK</span> ] Reached target Basic System.
Starting Permit User Sessions...
Starting D-Bus System Message Bus...
[ <span class="color-green">OK</span> ] Started D-Bus System Message Bus.
Starting Login Service...
Starting Cleanup of Temporary Directories...
[ <span class="color-green">OK</span> ] Started Permit User Sessions.
[ <span class="color-green">OK</span> ] Started Cleanup of Temporary Directories.
Starting Console Getty...
[ <span class="color-green">OK</span> ] Started Console Getty.
[ <span class="color-green">OK</span> ] Reached target Login Prompts.
[ <span class="color-green">OK</span> ] Started Login Service.
[ <span class="color-green">OK</span> ] Reached target Multi-User System.
Fedora release 20 (Heisenbug)
Kernel 3.9.2-200.fc18.x86_64 on an x86_64 (console)
fedora login:
</pre>
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