RRDLASTUPDATE(1) rrdtool RRDLASTUPDATE(1)

# [NAME](#NAME)

rrdlastupdate - Return the most recent update to an RRD

# [SYNOPSIS](#SYNOPSIS)

**rrdtool** **lastupdate** *filename* \[**--daemon**|**-d** *address*]

# [DESCRIPTION](#DESCRIPTION)

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

[*filename*](#filename)

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

[**--daemon**|**-d** *address*](#daemon)

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](#ENVIRONMENT_VARIABLES)

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

[**RRDCACHED\_ADDRESS**](#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](#AUTHOR)

Andy Riebs <andy.riebs@hp.com>

2026-09-01 1.11.0

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Document: rrdlastupdate(1) from rrdtool 1.11.0-r1 (Chainguard OS)
Source: https://github.com/oetiker/rrdtool-1.x