Documentation Boot Beat

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{{Draft| '''NEED rewrite''': insert the '''boot options''', remove or move some contents to other places, perhaps split it}}
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= systemd =
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'''systemd''' is a system and service manager, replacement for SysVinit and Upstart. After a six months shift, during which it has been more granularly tested, Fedora 15 brings in, by default, a new system daemon whose code is designed from scratch, with the objective to take the maximum advantage offered by modern Linux kernel.  
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= Faster boot with host-only initramfs =
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This Fedora release builds an initramfs tailored especially for your computer hardware, allowing faster boot. If you change your machine or significant hardware, you might have to boot with the "Rescue" boot entry and execute "dracut --regenerate-all". If you want your initramfs to be hardware independent, install the "dracut-nohostonly" rpm package. If you don't want rescue images at all (like in virtual machines), install the "dracut-norescue" rpm package.
  
With '''systemd''', Fedora 15 boots-up faster, particularly on SSD; native systemd service configuration files (or units) are much easier to understand and configure compared to sysvinit scripts, as systemd uses <code>.service</code> files instead of bash script; all daemons are sorted into their own Linux cgroups, which you may explore beneath <code>/cgroup/systemd</code> in the file system hierarchy; administrative features of the init system are considerably extended.
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= systemd =
 
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Refer to https://fedoraproject.org/wiki/Systemd for more complete information on systemd in Fedora.
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=== Developer ===
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Lennart Poettering (lpoetter AT redhat.com)
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= 4kB Sector disk boot support =
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== Modular service configuration with drop-in files ==
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systemd will now look for configuration directives for a service as `/etc/sytemd/system/foobar.service.d/*.conf`, making site-specific changes easier to deploy and distribute .
  
Booting 4kB sector disks in UEFI environments is now supported.
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== graphing the boot process ==
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- systemd-analyze can now use the GraphViz `dot` tool to generate graphs of the boot process. GraphViz can be installed with `yum install graphviz` and will create a representation of the full boot process with `systemd-analyze dot | dot -Tsvg > systemd.svg` More refined plots can be generated with the optional arguments "--order" "--require" "--from-pattern=" and "--to-pattern="
  
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For more details and examples, see `man 1 systemd-analyze`.
  
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== PrivateTmp ==
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Services with a PrivateTmp= directory defined in their configuration make use of a private temporary directory that is shared by all processes of the service. These temporary files are deleted when the service is stopped.
 
[[Category:Docs Project]]
 
[[Category:Docs Project]]
 
[[Category:Draft documentation]]
 
[[Category:Draft documentation]]
 
[[Category:Documentation beats]]
 
[[Category:Documentation beats]]

Revision as of 04:59, 8 May 2013

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Beat Closed on Wiki
Work on beats has now moved to git. If you have changes or additions, please contact the docs team via #fedora-docs, docs@lists.fp.o, or with the fedora-release-notes BZ component.


Contents

Faster boot with host-only initramfs

This Fedora release builds an initramfs tailored especially for your computer hardware, allowing faster boot. If you change your machine or significant hardware, you might have to boot with the "Rescue" boot entry and execute "dracut --regenerate-all". If you want your initramfs to be hardware independent, install the "dracut-nohostonly" rpm package. If you don't want rescue images at all (like in virtual machines), install the "dracut-norescue" rpm package.

systemd

Modular service configuration with drop-in files

systemd will now look for configuration directives for a service as `/etc/sytemd/system/foobar.service.d/*.conf`, making site-specific changes easier to deploy and distribute .

graphing the boot process

- systemd-analyze can now use the GraphViz `dot` tool to generate graphs of the boot process. GraphViz can be installed with `yum install graphviz` and will create a representation of the full boot process with `systemd-analyze dot | dot -Tsvg > systemd.svg` More refined plots can be generated with the optional arguments "--order" "--require" "--from-pattern=" and "--to-pattern="

For more details and examples, see `man 1 systemd-analyze`.

PrivateTmp

Services with a PrivateTmp= directory defined in their configuration make use of a private temporary directory that is shared by all processes of the service. These temporary files are deleted when the service is stopped.