# phpman > man > RRDLASTUPDATE(1)

[RRDLASTUPDATE(1)](https://www.chedong.com/phpMan.php/man/RRDLASTUPDATE/1/markdown)                               rrdtool                              [RRDLASTUPDATE(1)](https://www.chedong.com/phpMan.php/man/RRDLASTUPDATE/1/markdown)



## NAME
       rrdlastupdate - Return the most recent update to an RRD

## SYNOPSIS
       **rrdtool** **lastupdate** _filename_ [**--daemon**|**-d** _address_]

## DESCRIPTION
       The **lastupdate** function returns the UNIX timestamp and the value stored for each datum in the
       most recent update of an RRD.

       _filename_
               The name of the **RRD** that contains the data.

       **--daemon**|**-d** _address_
               Address of the rrdcached daemon. If specified, a "flush" command is sent to the
               server before reading the RRD files. This allows **rrdtool** to return fresh data even if
               the daemon is configured to cache values for a long time.  For a list of accepted
               formats, see the **-l** option in the rrdcached manual.

                rrdtool lastupdate --daemon unix:/var/run/rrdcached.sock /var/lib/rrd/foo.rrd

## ENVIRONMENT VARIABLES
       The following environment variables may be used to change the behavior of
       "rrdtool lastupdate":

       **RRDCACHED**___**ADDRESS**
           If this environment variable is set it will have the same effect as specifying the
           "--daemon" option on the command line. If both are present, the command line argument
           takes precedence.

## AUTHOR
       Andy Riebs <<andy.riebs@hp.com>>



1.7.2                                        2022-03-17                             [RRDLASTUPDATE(1)](https://www.chedong.com/phpMan.php/man/RRDLASTUPDATE/1/markdown)