Libguestfs - Mar 2016 - Re: [PATCH] appliance: Copy /etc/machine-id from host system into the appliance.

On Tue, Mar 29, 2016 at 03:14:15PM +0200, Pino Toscano
wrote:
> +# Create a machine-id with a random UUID
> +dd if=/dev/urandom bs=1 count=16 status=none | od -x -A n | sed -e 's,
,,g' > /etc/machine-id
Out of interest, why read single bytes, and not the whole 16 bytes in
one go?

Rich.


-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
libguestfs lets you edit virtual machines.  Supports shell scripting,
bindings from many languages.  http://libguestfs.org

On Tuesday 29 March 2016 16:50:01 Richard W.M. Jones
wrote:
> On Tue, Mar 29, 2016 at 03:14:15PM +0200, Pino Toscano wrote:
> > +# Create a machine-id with a random UUID
> > +dd if=/dev/urandom bs=1 count=16 status=none | od -x -A n | sed -e
's, ,,g' > /etc/machine-id
> 
> Out of interest, why read single bytes, and not the whole 16 bytes in
> one go?
Just habit :)

(It works the same with bs=16 count=1 of course -- did the change
locally.)

-- 
Pino Toscano

On Tue, Mar 29, 2016 at 06:10:17PM +0200, Pino Toscano
wrote:
> On Tuesday 29 March 2016 16:50:01 Richard W.M. Jones wrote:
> > On Tue, Mar 29, 2016 at 03:14:15PM +0200, Pino Toscano wrote:
> > > +# Create a machine-id with a random UUID
> > > +dd if=/dev/urandom bs=1 count=16 status=none | od -x -A n | sed
-e 's, ,,g' > /etc/machine-id
> > 
> > Out of interest, why read single bytes, and not the whole 16 bytes in
> > one go?
> 
> Just habit :)
> 
> (It works the same with bs=16 count=1 of course -- did the change
> locally.)
OK, ACK with that change.

Thanks,

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
libguestfs lets you edit virtual machines.  Supports shell scripting,
bindings from many languages.  http://libguestfs.org