:: Re: [DNG] new freedesktop "standard…
Forside
Slet denne besked
Besvar denne besked
Skribent: KatolaZ
Dato:  
Til: dng
Emne: Re: [DNG] new freedesktop "standard": /etc/machine-id
On Fri, Mar 08, 2019 at 06:38:32PM +0100, Arnt Karlsen wrote:

[cut]

>
> > > I don't seem to have it and everything works without it.
> >
> > It's on my beowulf installations, and I didn't even know that it was
> > there :-/
>
> ..quick starting point:
> ll /proc/sys/kernel/random/boot_id /etc/hostid /etc/machine-id \
> /var/lib/dbus/machine-id /var/db/dbus/machine-id
>


$ ll
bash: ll: command not found
$

:P

anyway:

- /etc/hostid is defined in POSIX 2001 and POSIX 2008 (man gethostid)

- /proc/sys/kernel/random/boot_id is randomly generated by the kernel
at each boot (see drivers/char/random.c and kernel/sysctl.c in the
kernel tree)

- /var/lib/dbus/machine-id is used by dbus, and at the moment seems to
not being re-generated at each boot (my recollection was wrong: we
will fix it)

- /etc/machine-id should be used only by systemd components.

My2Cents

KatolaZ

-- 
[ ~.,_  Enzo Nicosia aka KatolaZ - Devuan -- Freaknet Medialab  ]  
[     "+.  katolaz [at] freaknet.org --- katolaz [at] yahoo.it  ]
[       @)   http://kalos.mine.nu ---  Devuan GNU + Linux User  ]
[     @@)  http://maths.qmul.ac.uk/~vnicosia --  GPG: 0B5F062F  ] 
[ (@@@)  Twitter: @KatolaZ - skype: katolaz -- github: KatolaZ  ]