Backup scripts

Kevin Korb kmk at
Thu Sep 4 15:44:20 MDT 2014

Hash: SHA1

That is how to do an incremental backup.  But rsync can do a snapshot
with --link-dest instead of --backup.  The big difference is that with
- --link-dest each backup will contain the entire tree not just the
different files.  Therefore if you need to restore an old version you
can do so without merging the current with the old.

Also, no -z on a local copy ;)

On 09/04/2014 05:41 PM, Greg Deback (rsync) wrote:
> Hi,
> I think the words used are not correct, that's why you (and Kevin)
> are a bit confused. You are in fact asking for "incremental"
> backup, not a "snapshot" :
> In this
> case, you can use rsync with a few flags to delete (or move in 
> another directory) the modified/deleted files regarding the last
> "backup".
> This would look something like this ((h)uman, do not (x)cross
> filesystem boundaries, (P)rogress, (H)ard-links, (a)rchive, aka 
> recursive+symlinks+perms+time+owner+group+specials and g(z)ip):
> # Cloning your data to a distant folder with timestamp rsync
> -hxPHaz --exclude=<exclude_list> <source> <target>/$NOW/ #
> Incremental backup only rsync -hxPHaz --exclude=<exclude_list>
> --delete --backup --backup-dir=<backup> <source> <target>/latest/ #
> You can even "suffix" the modified/deleted files rsync -hxPHaz
> --exclude=<exclude_list> --delete --backup --backup-dir=<backup>
> --suffix=~$NOW <source> <target>/latest/
> Hope that will help, Greg
> On Thu, Sep 4, 2014 at 11:21 PM, Kevin Korb <kmk at 
> <mailto:kmk at>> wrote:
> Yes, you have different scripts now at least.  But I still don't
> see any snapshotting.  The only difference in these is that the
> "full" one rsyncs to a date+time stamped directory while the
> "snapshot" one rsyncs to a directory named snapshot.  As far as I
> can tell both will be a complete copy with no relationship to the
> other.
> On 09/04/2014 05:17 PM, Chris wrote:
>> On Thu, 2014-09-04 at 17:00 -0400, Kevin Korb wrote:
>>> Do you actually have any snapshots currently?  From the
>>> scripts you posted it seems to just be rsyncing to the same dir
>>> every run and only claiming to be making snapshots.  If you do
>>> have snapshots now then something else is happening in addition
>>> to this script.
>> It was pointed out to me in a direct message that I had 
>> inadvertently posted the same scripts (full backup) in pastebin. 
>> Here are the correct one.
>> Full
>> Snapshot
>>> On 09/04/2014 04:58 PM, Chris wrote:
>>>> On Thu, 2014-09-04 at 12:46 -0400, Kevin Korb wrote:
>>>>> The scripts you posted look the same to me.  And I don't
>>>>> see any form of snapshotting.  The $NOW variable is set and
>>>>> is echoed but it is never actually used.  For an rsync
>>>>> snapshot I would expect to see either rsync --link-dest or
>>>>> a cp -al depending on the age of the script.
>>>>> The only reason to need two scripts would be because the 
>>>>> snapshot would need 3 dirs to work with (the source, the 
>>>>> target, and the previous backup) but that could also be 
>>>>> handled with 1 script and a simple existing check.
>>>>> On 09/04/2014 12:30 PM, Chris wrote:
>>>>>> I have two scripts that a kind soul on this list wrote
>>>>>> for me over 4yrs ago. I got to looking at them the other
>>>>>> day because my old box crashed and had to build a new one
>>>>>> also got a new backup USB drive since I'm still copying
>>>>>> over things from the old one. The first one is for a
>>>>>> full backup:
>>>>>> Works great, does exactly what it's supposed to do. The 
>>>>>> second is for a 'snapshot' which is where I get a bit 
>>>>>> confused. I would think that a 'snapshot' would be just
>>>>>> the changed files either since the last full backup or
>>>>>> since the last 'snapshot' the night before. It seems
>>>>>> though that it's actually the same as a full backup. I
>>>>>> don't profess to be a script person so I have no idea if
>>>>>> it's doing what it should or something needs to be
>>>>>> changed. Below is the 2nd script:
>>>>>> Any advice would be appreciated.
>>>>>> Chris
>>>> Thanks Kevin, I guess for now I'll leave them as they are
>>>> until I can get smart on scripting.
>>>> Chris
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