On Thu, 2 Jan 2014 17:55:50 +0000 Tom H sent:
> On Thu, Jan 2, 2014 at 1:53 PM, Bonno Bloksma <b.blok...@tio.nl>
> wrote:
> >>>
> >>> # rmmod ipv6
> >>>
> >>> libkmod: ERROR ../libkmod/libkmod-module.c:1802
> >>> kmod_module_get_holders: could not open
> >>> '/sys/module/ipv6/holders': No such file or directory Error:
> >>> Module ipv6 is in use
> >>
> >> So I am certain now that I don't have ipv6 enabled at all, and
> >> that message can be ignored.
> >
> > In previous Debian versions ipv6 was done via a module that one
> > could unload or disable to prevent ipv6 being activated. As of
> > Squeeze ipv6 is built in at the kernel level and cannot be disabled
> > that way.
> >
> > So unless you are still running Lenny or build your own kernel
> > there is no ipv6 module. Just do "ip addr" or "ifconfig" and you
> > will probably see ip6 lines, ip6 is default on now. If your uplink
> > does not do ipv6 then there is no ipv6 traffic going over the line
> > and no delay in using ipv4.
>
> When ipv6 is compiled as a module, you can disable it with modprobe
> or sysctl.
>
> When ipv6 is compiled in-kernel, you can disable it in two ways.
>
> You can disable the ipv6 stack by adding "ipv6.disable=1" to the
> kernel cmdline.
>
> You can disable the assignment of ipv6 addresses to nics by adding
> "ipv6.disable_ipv6=1" to the kernel cmdline.
>
> The latter's the equivalent of creating
> "/etc/sysctl.d/disable_ipv6.conf" where
>
> # cat /etc/sysctl.d/disable_ipv6.conf
> net.ipv6.conf.all.disable_ipv6=1
> net.ipv6.conf.default.disable_ipv6=1
> net.ipv6.conf.eth<X>.disable_ipv6=1
>
> (or you can "echo 1 > /proc/sys/net/ipv6/conf/.../disable_ipv6" at
> boot)
Thank you all. I believe I was on a witch hunt.
I have disabled it on Windows machines for people who use satellite in
our area. To help them achieve better Internet performance. Just thought
I should be certain that, what I assumed, I'm not using it in Debian,
was correct.
I thought it wasn't an addition to my system, but after that spurious
message, doubts - doubts and more doubts.
Thought the beast better be hunted down and removed. Not being able to
find it, even after much googling as to commands that might flush it, or
how it might be recognised without any success at finding it in my
system.
Thought I better hand it to all you good people with greater knowledge
than myself, who have set my mind at rest. Proving it can't be
discovered. The reason being, it's not there except in the reply of that
message.
Thank you all.
Charlie
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