RRDLAST(1)

📦
version 1.11.0 · 13 versions
, in arch rolling

💅 RRDLAST(1) — the rrdtool girlies' guide

okay so bestie, welcome to rrdlast from the rrdtool fam 💖 this is the little icon that tells you when your RRD was last touched. genuinely useful, no cap.

✨ NAME ✨

rrdlast — returns the date of the last data sample in an RRD 🎀

🌸 SYNOPSIS 🌸

rrdtool last filename [--daemon|-d address]

that's it. that's the whole vibe check. one filename, one optional daemon flag, slay. ✨

🦋 DESCRIPTION 🦋

so the last function does exactly one thing and does it gorgeously: it hands you back the UNIX timestamp of the most recent update of the RRD. that's the whole main character arc. 🕐💅

  • filename — the name of the RRD that contains the data. literally just point at your file, bestie, that's it 🫶
  • --daemon|-d address — address of the rrdcached daemon. if you specify it, a "flush" command gets sent to the server before reading the RRD files. the way that matters: it lets rrdtool return fresh data even if the daemon is configured to cache values for a long time. like, you get the new new, not the stale stale 😭✨

for a list of accepted formats, see the -l option in the rrdcached manual — that's where the deets live, iykyk 👑

example time, look at her go:

rrdtool last --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 last":

  • RRDCACHED_ADDRESS — if this environment variable is set it will have the same effect as specifying the "--daemon" option on the command line. and if both are present? the command line argument takes precedence. command line stays winning, periodt 👑🔥

💜 AUTHOR 💜

Russ Wright <rwwright@home.com> — and daemon support was added by Steve Shipway <steve@steveshipway.org>. kings, honestly 🫶

tiny reminder bestie: the flags are exactly what they look like, no renaming, no vibes-based guessing. copy them character for character and you're golden ✨

and that's the whole page! 🎀 this was rrdtool version 1.11.0, dated 2026-10-17 — mwah, go check your timestamps, ily, bye 💖🦋

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