On Mon, Apr 09, 2018 at 12:50:33PM +0200, Christophe Simon wrote:
> The command I executed was run on OpenBSD:
>
> $ uname -a
> OpenBSD XXX 6.3 GENERIC.MP#107 amd64
>
> $ /bin/date -d 'now -1 day' '+%Y_%m_%d'
> 2018_04_09
>
> $ /bin/date -d 'yesterday' '+%Y_%m_%d'
> 2018_04_09
>
> I don't know when it was imported into BSD's date, but this extension is
> available on OpenBSD, at least in 6.3...
There is a -d option, but it does not do what you expect. What
date is it now? Try other values than -1
-Otto
>
> Regards.
>
> Christophe
>
> Le 04/09/18 à 10:54, Otto Moerbeek a écrit :
> > On Mon, Apr 09, 2018 at 10:38:11AM +0200, Christophe Simon wrote:
> >
> > > Hi,
> > >
> > > You can use this form, which is a little simpler:
> > >
> > > date -d 'now -1 day' '+%Y_%m_%d'
> >
> > Nope, this is a GNU extension.
> >
> > -Otto
> >
> > >
> > > Regards
> > >
> > > Christophe
> > >
> > > Le 04/09/18 à 07:54, Robert Klein a écrit :
> > > > Hi Max,
> > > >
> > > > this works for me:
> > > >
> > > > date -r $(( $(date +%s) - 1 * 24 * 60 * 60 )) +%Y_%m_%d
> > > >
> > > >
> > > > Best regards
> > > > Robert
> > > >
> > > > On Mon, 09 Apr 2018 07:45:05 +0200
> > > > Max Power <open...@cpnetserver.net> wrote:
> > > >
> > > > > Hi guys,
> > > > > How can I do to get yesterday's date?
> > > > > I need for create a backup directory.
> > > > > On Linux:
> > > > > yesterday=backup_$(date -d "yesterday" '+%Y_%m_%d')
> > > > > mkdir -p /raid1/backup/$yesterday
> > > > >
> > > > > Thanks for reply.
> > > > >
> > > >
> > > >
> >
