show yesterday by date command

[hankycheng]

Hi all

I want to show yesterday & before 5 days ago on screen
How to do that? Tks all!

It can be show date format like this

Code: Select all

NAS> date +%Y-%m-%d
2012-05-03


if I want to show yesterday day but fail

Code: Select all

NAS> date +%Y-%m-%d --date "yesterday"
date: invalid date 'yesterday'

[maxxfi]

Probably it cannot be done. I cannot check right now, but I guess 'date' command is implemented by the multi-binary busybox, which doesn't provide all the fanciest options.
Perhaps, if there is a date package in IPKG/optware, that one would likely support such a syntax.

[CoolRaoul]

Hi all
if I want to show yesterday day but fail

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NAS> date +%Y-%m-%d --date "yesterday"
date: invalid date 'yesterday'

Strangely, even if DSM built-in "date" command in-line documentation show that "-d|--date" command arguments are supported (try "/bin/date --help") it doesn't seem to work as documented

If you've configured ipkg/optware you can install "corutils" package, whose "date" command fully supports "--date" with all GNU bells and whistles

***EDIT***
found a workaround removing the requirement to use any optware package:
http://lists.busybox.net/pipermail/busy ... 68752.html

this will do the trick using built-in "date":

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/bin/date -D "%s" -d $(( $(/bin/date +%s ) - 86400 )) +%Y-%m-%d