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Re: Question about kernel boot parameter




On Friday 08 June 2018 16:18:36 Reco wrote:

> 	Hi.
>
> On Fri, Jun 08, 2018 at 02:05:45PM -0400, Gene Heskett wrote:
> > On Friday 08 June 2018 10:44:32 Dejan Jocic wrote:
> > > On 08-06-18, stuv wrote:
> > > > Hi everyone,
> > > >
> > > > I'm using a debian derivate of linux and i'm searching for a way
> > > > to make permanent changes to the kernel boot parameters without
> > > > GRUB or any other boot loader, i want to disable ipv6
> > > > permanently, when i do it over /init.d/modprobe.d the changes
> > > > only last until the next reboot.
> > > >
> > > > best regards.
> > >
> > > man sysctl
> > > man sysctl.conf
> > > man sysctl.d
> > >
> > > and then read files /etc/sysctl.conf and files under
> > > /etc/sysctl.d/. Those should give you enough examples. For your
> > > example, line you need to add to some of those files, or even
> > > better new file under sysctl.d with descriptive name for what will
> > > be done in it:
> > >
> > > net.ipv6.conf.all.disable_ipv6 = 1
> >
> > This is informative, and I'll use it because my 12 machine home
> > network is all ipv4, but its for only one option. Doing "sysctl
> > -a|wc -l" gets me 829 such options to set.  So where can I find the
> > real, complete, list of options AND the effect of changing each one?
>
> procfs(5) contains abridged list of these kernel tunables. "ip
> netconf" will decypher you some more, mostly network related.
>
> The documentation for you current kernel is the ultimate source of
> such knowledge. For stock Debian kernels it resides in linux-doc*
> packages.
>
> But, on that rare occasion that the option isn't there - there are
> kernel sources. Your kernel won't use the tunable anyway unless it's
> in the source ;)
>
> Reco

Thanks Reco, I'll run that stuff down tomorrow and get it installed if I 
can. This is an ayufan build for arm64. If that means anything.


-- 
Cheers, Gene Heskett
--
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-Ed Howdershelt (Author)
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