PLUG Digest, Vol 74, Issue 5

Derek Cox dcox at aquaveo.com
Thu Feb 3 12:11:12 MST 2011


Thanks for the advice.


Derek

On Thu, Feb 3, 2011 at 12:00 PM, <plug-request at plug.org> wrote:

> Send PLUG mailing list submissions to
>        plug at plug.org
>
> To subscribe or unsubscribe via the World Wide Web, visit
>        http://plug.org/mailman/listinfo/plug
> or, via email, send a message with subject or body 'help' to
>        plug-request at plug.org
>
> You can reach the person managing the list at
>        plug-owner at plug.org
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of PLUG digest..."
>
> Today's Topics:
>
>   1. Linux image solution (Derek Cox)
>   2. Re: Linux image solution (Michael Peterson)
>   3. Re: Linux image solution (Michael Peterson)
>   4. Re: Linux image solution (Stuart Jansen)
>   5. Re: Linux image solution (Corey Edwards)
>   6. Re: Linux image solution (Stuart Jansen)
>   7. Re: Linux image solution (Michael Peterson)
>   8. Re: Linux image solution (Corey Edwards)
>   9. Re: Linux image solution (Michael Torrie)
>  10. Re: Spam via Postfix (Andy Bradford)
>
>
> ---------- Forwarded message ----------
> From: Derek Cox <dcox at aquaveo.com>
> To: plug at plug.org
> Date: Wed, 2 Feb 2011 13:38:07 -0700
> Subject: Linux image solution
> I am looking for an imaging solution for Linux.  I know Acronis can do
> backups while the machine is running, under windows.  Does anyone know of a
> free imaging software that can backup a Linux machine without requiring a
> reboot?
>
>
>
>
> Thanks,
> Derek
>
>
>
> ---------- Forwarded message ----------
> From: Michael Peterson <mellence at gmail.com>
> To: Provo Linux Users Group <plug at plug.org>
> Date: Wed, 2 Feb 2011 13:42:05 -0700
> Subject: Re: Linux image solution
> On Wed, Feb 2, 2011 at 1:38 PM, Derek Cox <dcox at aquaveo.com> wrote:
> > I am looking for an imaging solution for Linux.  I know Acronis can do
> > backups while the machine is running, under windows.  Does anyone know of
> a
> > free imaging software that can backup a Linux machine without requiring a
> > reboot?
> >
> >
> >
> >
> > Thanks,
> > Derek
> >
> > /*
> > PLUG: http://plug.org, #utah on irc.freenode.net
> > Unsubscribe: http://plug.org/mailman/options/plug
> > Don't fear the penguin.
> > */
> >
>
> You can use dd to copy the contents of a device. Syntax is:
>
> dd if=/dev/sda1 of=~/image
>
> Where /dev/sd** where /dev/sd** is the drive and partition you want to
> copy and ~/image is the place where you want to put the image.
>
> if and of signify input and output files respectively.
>
> I'm not sure if that's what you're looking for, but it is a way.
>
>
>
> ---------- Forwarded message ----------
> From: Michael Peterson <mellence at gmail.com>
> To: Provo Linux Users Group <plug at plug.org>
> Date: Wed, 2 Feb 2011 13:46:40 -0700
> Subject: Re: Linux image solution
> On Wed, Feb 2, 2011 at 1:42 PM, Michael Peterson <mellence at gmail.com>
> wrote:
> > On Wed, Feb 2, 2011 at 1:38 PM, Derek Cox <dcox at aquaveo.com> wrote:
> >> I am looking for an imaging solution for Linux.  I know Acronis can do
> >> backups while the machine is running, under windows.  Does anyone know
> of a
> >> free imaging software that can backup a Linux machine without requiring
> a
> >> reboot?
> >>
> >>
> >>
> >>
> >> Thanks,
> >> Derek
> >>
> >> /*
> >> PLUG: http://plug.org, #utah on irc.freenode.net
> >> Unsubscribe: http://plug.org/mailman/options/plug
> >> Don't fear the penguin.
> >> */
> >>
> >
> > You can use dd to copy the contents of a device. Syntax is:
> >
> > dd if=/dev/sda1 of=~/image
> >
> > Where /dev/sd** where /dev/sd** is the drive and partition you want to
> > copy and ~/image is the place where you want to put the image.
> >
> > if and of signify input and output files respectively.
> >
> > I'm not sure if that's what you're looking for, but it is a way.
> >
>
> Oh sorry, I did the really bad typo. The syntax, to make sense with
> the rest of my stuff, should be:
>
> dd if=/dev/sd** of=~/image
>
> And if you want to get carried away, you can use bs= and count= to
> specify through blocks what you want to copy.
>
>
>
> ---------- Forwarded message ----------
> From: Stuart Jansen <sjansen at buscaluz.org>
> To: Provo Linux Users Group <plug at plug.org>
> Date: Wed, 02 Feb 2011 13:59:18 -0700
> Subject: Re: Linux image solution
> On Wed, 2011-02-02 at 13:42 -0700, Michael Peterson wrote:
> > On Wed, Feb 2, 2011 at 1:38 PM, Derek Cox <dcox at aquaveo.com> wrote:
> > > Does anyone know of a
> > > free imaging software that can backup a Linux machine without requiring
> a
> > > reboot?
> >
> > You can use dd to copy the contents of a device. Syntax is:
> >
> > dd if=/dev/sda1 of=~/image
> >
> > Where /dev/sd** where /dev/sd** is the drive and partition you want to
> > copy and ~/image is the place where you want to put the image.
>
> Dude! Very bad idea!
>
> Only safe for a cold backup after booting off DVD.
>
>
>
>
> ---------- Forwarded message ----------
> From: Corey Edwards <tensai at zmonkey.org>
> To: Provo Linux Users Group <plug at plug.org>
> Date: Wed, 02 Feb 2011 14:02:06 -0700
> Subject: Re: Linux image solution
> On 02/02/2011 01:59 PM, Stuart Jansen wrote:
> > On Wed, 2011-02-02 at 13:42 -0700, Michael Peterson wrote:
> >> On Wed, Feb 2, 2011 at 1:38 PM, Derek Cox <dcox at aquaveo.com> wrote:
> >>> Does anyone know of a
> >>> free imaging software that can backup a Linux machine without requiring
> a
> >>> reboot?
> >>
> >> You can use dd to copy the contents of a device. Syntax is:
> >>
> >> dd if=/dev/sda1 of=~/image
> >>
> >> Where /dev/sd** where /dev/sd** is the drive and partition you want to
> >> copy and ~/image is the place where you want to put the image.
> >
> > Dude! Very bad idea!
>
> Agreed.
>
> > Only safe for a cold backup after booting off DVD.
>
> Or if you freeze the filesystem with LVM or XFS.
>
> To the OP, it would be useful to have more details about what you're
> trying to accomplish. There are a myriad of ways to backup a system
> depending on what your goal is.
>
> Corey
>
>
>
> ---------- Forwarded message ----------
> From: Stuart Jansen <sjansen at buscaluz.org>
> To: plug at plug.org
> Date: Wed, 02 Feb 2011 14:06:43 -0700
> Subject: Re: Linux image solution
> On Wed, 2011-02-02 at 14:02 -0700, Corey Edwards wrote:
> > On 02/02/2011 01:59 PM, Stuart Jansen wrote:
> > > On Wed, 2011-02-02 at 13:42 -0700, Michael Peterson wrote:
> > >> dd if=/dev/sda1 of=~/image
> > >
> > > Only safe for a cold backup after booting off DVD.
> >
> > Or if you freeze the filesystem with LVM or XFS.
>
> You mean snapshot? I'd have to know more about the system. Probably safe
> for a lightly used e-mail server, no way it's sufficient with a busy
> database server.
>
>
>
>
> ---------- Forwarded message ----------
> From: Michael Peterson <mellence at gmail.com>
> To: Provo Linux Users Group <plug at plug.org>
> Date: Wed, 2 Feb 2011 14:07:16 -0700
> Subject: Re: Linux image solution
> On Wed, Feb 2, 2011 at 1:59 PM, Stuart Jansen <sjansen at buscaluz.org>
> wrote:
> > On Wed, 2011-02-02 at 13:42 -0700, Michael Peterson wrote:
> >> On Wed, Feb 2, 2011 at 1:38 PM, Derek Cox <dcox at aquaveo.com> wrote:
> >> > Does anyone know of a
> >> > free imaging software that can backup a Linux machine without
> requiring a
> >> > reboot?
> >>
> >> You can use dd to copy the contents of a device. Syntax is:
> >>
> >> dd if=/dev/sda1 of=~/image
> >>
> >> Where /dev/sd** where /dev/sd** is the drive and partition you want to
> >> copy and ~/image is the place where you want to put the image.
> >
> > Dude! Very bad idea!
> >
> > Only safe for a cold backup after booting off DVD.
> >
> >
> > /*
> > PLUG: http://plug.org, #utah on irc.freenode.net
> > Unsubscribe: http://plug.org/mailman/options/plug
> > Don't fear the penguin.
> > */
> >
>
> Very good to know. I've never actually done it, I just know it's possible.
>
> We all learn things every day!
>
>
>
> ---------- Forwarded message ----------
> From: Corey Edwards <tensai at zmonkey.org>
> To: Provo Linux Users Group <plug at plug.org>
> Date: Wed, 02 Feb 2011 14:09:46 -0700
> Subject: Re: Linux image solution
> On 02/02/2011 02:06 PM, Stuart Jansen wrote:
> > On Wed, 2011-02-02 at 14:02 -0700, Corey Edwards wrote:
> >> On 02/02/2011 01:59 PM, Stuart Jansen wrote:
> >>> On Wed, 2011-02-02 at 13:42 -0700, Michael Peterson wrote:
> >>>> dd if=/dev/sda1 of=~/image
> >>>
> >>> Only safe for a cold backup after booting off DVD.
> >>
> >> Or if you freeze the filesystem with LVM or XFS.
> >
> > You mean snapshot? I'd have to know more about the system. Probably safe
> > for a lightly used e-mail server, no way it's sufficient with a busy
> > database server.
>
> LVM calls it a snapshot, XFS calls it a freeze. Similar ideas. They're
> one potential way of backing up, but yes it depends entirely on what the
> goals are and what type of data we're talking about. I'll thrown in that
> I've never found a good use for a byte-for-byte backup except for
> forensic analysis.
>
> Corey
>
>
>
>
> ---------- Forwarded message ----------
> From: Michael Torrie <torriem at gmail.com>
> To: plug at plug.org
> Date: Wed, 02 Feb 2011 16:04:10 -0700
> Subject: Re: Linux image solution
> On 02/02/2011 01:38 PM, Derek Cox wrote:
> > I am looking for an imaging solution for Linux.  I know Acronis can do
> > backups while the machine is running, under windows.  Does anyone know of
> a
> > free imaging software that can backup a Linux machine without requiring a
> > reboot?
>
> I have had success backing up a running system with rsync -ravHx.
>
> Things like SQL are problematic and other forms of hot backup should be
> used.
>
> The nice thing about linux is that after an rsync all you have to do is
> write boot loader to disk (and maybe mess with fstab).  None of this
> "file is in use and cannot be read from" crap that MS still has after
> all these years.
>
>
>
> ---------- Forwarded message ----------
> From: "Andy Bradford" <amb-plugg at bradfords.org>
> To: "Jessie Adan Morris" <jessie at confettiantiques.com>
> Date: 2 Feb 2011 19:03:18 -0700
> Subject: Re: Spam via Postfix
> Thus said Jessie Adan Morris on Tue, 01 Feb 2011 23:39:52 MST:
>
> > Logs include entries which look like:
> >
> > Feb  1 23:39:22 nova postfix/error[16480]: 255571FAD5A:
> > to=<kftjf at verizon.net>, relay=none, delay=13, delays=0.44/0.06/0/12,
> > dsn=4.0.0, status=deferred (delivery temporarily suspended: host
> > relay.verizon.net[206.46.232.11] refused to talk to me: 571 Email from
> > 160.7.244.25 is currently blocked by Verizon Online's anti-spam system.
> > The email sender or Email Service Provider may visit
> > http://www.verizon.net/whitelist and request removal of the block.
> > 110202)
>
> What about  this log indicates that  your SMTP mail server  (postfix) is
> relaying email? All this shows is that your mail server tried to deliver
> a message to  a verizon mail server,  and that they rejected  it. Who is
> the sender  of the message  to kftjf at verizon.net? Who/what  injected the
> message? If indeed the message was  relayed by your server, there should
> be an  entry in  it's smtpd log  indicating this. If  you feel  you have
> configured postfix  correctly, then  I would look  elsewhere. I  see you
> have  PHP  running on  mail.caandb.com.  I  would  start looking  for  a
> hijacked PHP script.
>
> Andy
>
>
>
> _______________________________________________
> PLUG mailing list
> PLUG at plug.org
> http://plug.org/mailman/listinfo/plug
>


More information about the PLUG mailing list