Hi,

I have a script that ftpes some files from one server everyday. It has
a version of the same file that was ftped yesterday. Once the ftp is
over to take care of the case where the file might not be available
today it checks which is the older file and deletes that version of
the file so that only the newest exists.

So it would do
rm_filenm_12=`ls STRUCTURE-AM.FULL*IS*.dat | head -1`
rm $rm_filenm_12

This is working fine and removes the older version of the file.
But I am trying to introduce some new files for which I am trying to
put the same logic:

rm_filenm_16=`ls SERVICES-AM.FULL*.dat | head -1`
rm $rm_filenm_16

But here the command behaves exactly the opposite and removes the
latest file which means the older files exists. Also I have made sure
that files have different timestamps and the older file is one day old
but still the same issue.

can anyone advice me as to what could be the issue here or is there
something that I might be doing wrong which I need to check for.

Thanks,
Sandy

You can try using

find -newer <timestamp>

option for this.

swami.



On Mar 7, 5:28 pm, "Sandy80" <svarshneym...@gmail.com> wrote:
> Hi,
>
> I have a script that ftpes some files from one server everyday. It has
> a version of the same file that was ftped yesterday. Once the ftp is
> over to take care of the case where the file might not be available
> today it checks which is the older file and deletes that version of
> the file so that only the newest exists.
>
> So it would do
> rm_filenm_12=`ls STRUCTURE-AM.FULL*IS*.dat | head -1`
> rm $rm_filenm_12
>
> This is working fine and removes the older version of the file.
> But I am trying to introduce some new files for which I am trying to
> put the same logic:
>
> rm_filenm_16=`ls SERVICES-AM.FULL*.dat | head -1`
> rm $rm_filenm_16
>
> But here the command behaves exactly the opposite and removes the
> latest file which means the older files exists. Also I have made sure
> that files have different timestamps and the older file is one day old
> but still the same issue.
>
> can anyone advice me as to what could be the issue here or is there
> something that I might be doing wrong which I need to check for.
>
> Thanks,
> Sandy

Sandy80 wrote:
> Hi,
>
> I have a script that ftpes some files from one server everyday. It has
> a version of the same file that was ftped yesterday. Once the ftp is
> over to take care of the case where the file might not be available
> today it checks which is the older file and deletes that version of
> the file so that only the newest exists.
>
> So it would do
> rm_filenm_12=`ls STRUCTURE-AM.FULL*IS*.dat | head -1`
> rm $rm_filenm_12
>
> This is working fine and removes the older version of the file.
> But I am trying to introduce some new files for which I am trying to
> put the same logic:
>
> rm_filenm_16=`ls SERVICES-AM.FULL*.dat | head -1`
> rm $rm_filenm_16
>
> But here the command behaves exactly the opposite and removes the
> latest file which means the older files exists. Also I have made sure
> that files have different timestamps and the older file is one day old
> but still the same issue.
>
> can anyone advice me as to what could be the issue here or is there
> something that I might be doing wrong which I need to check for.
>

ls does alphabetic sorting,
so ls | head -1
is the filename that is first in the alphabet.

ls -tr | head -1
is the name of the oldest file.

--
Michael Tosch @ hp : com