[ale] backing up /var -POSTGRES & LABEL

[Jerry Yu]

you can label  a file system when you create it (mke2fs -L /var /dev/sdb1 )
or after (tune2fs -L /var /dev/sdb1 )

On 2/22/07, Paul Cartwright <paul_tbot at pcartwright.com> wrote:
>
> On Thursday 22 February 2007 08:37, Jeff Lightner wrote:
> > 1.) lsof /var (or fuser /var if you don't have lsof - lsof is far
> > superior in my experience - I've found some things fuser won't show you
> > that lsof does.)
> list open files, wow, what a thought!
> beats ps -ef for sure.
>
> > In my earlier response to your question I had noted that often going to
> > single user from a multi-user run level doesn't unmount /var - however
> > booting into single user shouldn't mount anything but /.
>
> to boot into single user, you need to change the default init state... I
> remember this: /etc/inittab;
>
> # The default runlevel is defined here
> id:5:initdefault:
>
> >
> > 2.) You could put a label on it but it's not necessary.
> > Personally I've never understood the fascination with labels in Linux.
> > It isn't always obvious later which partition goes with which label - if
> > I'm interested in the device rather than the mount point I'd just as
> > soon seen that in the fstab than try to figure it out. I gather the
> > idea is that if you see the label it helps you know it's purpose but it
> > seems easy enough to figure out purpose from the partition table and
> > fstab.
> according to 'man fstab' using LABELS is more "robust", but it still
> doesn't
> explain how to MAKE a label.. ( and I like using /dev/sdb? )
>   Instead  of  giving  the  device explicitly, one may indicate the (ext2
> or
> xfs) filesystem that is to be mounted by its UUID or volume label
> (cf.e2label(8) or  xfs_admin(8)),  writing LABEL=<label> or UUID=<uuid>,
> e.g., `LABEL=Boot' or `UUID=3e6be9de-8139-11d1-9106-a43f08d823a6'.  This
> will
> make  the  system  more robust: adding or removing a SCSI disk changes the
> disk device name but not the filesystem volume label.
>
> --
> Paul Cartwright
> Registered Linux user # 367800
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>
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