Ask Your Question

what kernel parameters are recognized by systemd?

asked 2011-11-30 01:05:52 -0500

Wayne gravatar image

In Fedora 14 and older, the various boot and service shell scripts examined the kernel arguments for certain keywords (and/or looked for certain files). In Fedora 14 these included: nomodules, default_affinity, nompath, nodmraid, noiswmd, fastboot, forcefsck, readonlyroot, noreadonlyroot, forcequotacheck (or the file /forcequotacheck), autorelabel (or the file /.autorelabel), netprofile, and reconfig (or the file /etc/reconfigSys).

Some of these keywords are still used by systemd in Fedora 15. I figured that out by using the strings command on the executables in /lib/systemd/. But I don't see where these are documented anywhere. (They weren't documented in Fedora 14 either, but by reading the shell scripts one could figure out what they were for.)

My question is, what keywords are still recognized by F15 and newer, and where are they documented?

edit retag flag offensive close merge delete

6 Answers

Sort by ยป oldest newest most voted

answered 2013-02-14 10:32:27 -0500

lennart gravatar image

Here's the precise list of kernel command line parameters systemd understands:

edit flag offensive delete link more

answered 2011-11-30 01:19:18 -0500

The full list of kernel options is in the file /usr/share/doc/kernel-doc-version/Documentation/kernel-parameters.txt, which is installed with the kernel-doc package.

From :

edit flag offensive delete link more

answered 2012-01-21 22:14:28 -0500

about systemctl to start/stop enable/disable services, at :

under the tools section. All about systemd is in the article.

edit flag offensive delete link more

answered 2012-01-15 21:12:30 -0500

The list of kernel command line options recognized by systemd is documented in systemd(1).

You can view the documentation online, or read the manual on your machine:

$ man 1 systemd

See the "Kernel Coomand Line" section for the details.

edit flag offensive delete link more

answered 2011-11-30 08:42:56 -0500

cebbert gravatar image

updated 2011-11-30 08:49:58 -0500

There is a list of boot options here:

How to debug Systemd problems

edit flag offensive delete link more


Wayne - it is a bit confusing as I do not think systemd handles all the boot flags / options. The man pages I gave you lists the systemd options, if it is not listed there, it is not managed by systemd. You might also try dracut.

bodhi.zazen gravatar imagebodhi.zazen ( 2011-11-30 13:04:12 -0500 )edit

answered 2011-11-30 13:00:14 -0500

OK, for the systemd options see :

man systemd.special

edit flag offensive delete link more

Question Tools


Asked: 2011-11-30 01:05:52 -0500

Seen: 6,091 times

Last updated: Feb 14 '13