RTMON(8)

📦
version 7.3.0 · 2 versions
  • 7.3.0 · alpine 3.22, alpine 3.23, alpine 3.24, arch rolling, centos-stream 10, centos-stream 9, debian trixie, fedora 43, fedora 44, nixos 26.05, nixpkgs unstable, opensuse-leap 16.0, ubuntu questing, ubuntu resolute, ubuntu stonking (latest)
  • 6.1.0 · debian bookworm, ubuntu jammy, ubuntu noble
, in alpine 3.22, alpine 3.23, alpine 3.24, arch rolling, centos-stream 10, centos-stream 9, debian trixie, fedora 43, fedora 44, nixos 26.05, nixpkgs unstable, opensuse-leap 16.0, ubuntu questing, ubuntu resolute, ubuntu stonking

🎀 RTMON(8) 🎀 — System Manager's Manual

✨ NAME ✨

okay so rtmon is the bestie that listens to and monitors RTnetlink 🦋

💜 SYNOPSIS 💜

rtmon [ OPTIONS ] file FILE [ all | OBJECTS ]

OPTIONS := { f[amily] { inet | inet6 | link | help } | -4 | -6 | -0 |
        -V[ersion] }

OBJECTS := [ link ] [ address ] [ route ]

🌸 DESCRIPTION 🌸

okay so this manual page briefly documents the rtmon command 💅

rtmon listens on the netlink socket and monitors routing table changes, no cap 🔥

rtmon can be started before the first network configuration command is issued. Main character timing 👑 For example, if you insert:

rtmon file /var/log/rtmon.log

in a startup script, you will be able to view the full history later 🧚 Certainly, it is possible to start rtmon at any time. It prepends the history with the state snapshot dumped at the moment of starting ✨

🍓 OPTIONS 🍓

rtmon supports the following options, bestie:

  • -Version — Print version and exit 💖
  • help — Show summary of options 🙈
  • file FILE [ all | OBJECTS ] — Log output to FILE. OBJECTS is the list of object types that we want to monitor. It may contain 'link', 'address', 'route' and 'all'. 'link' specifies the network device, 'address' the protocol (IP or IPv6) address on a device, 'route' the routing table entry, and 'all' does what the name says 🦋
  • -family [ inet | inet6 | link | help ] — Specify protocol family. 'inet' is IPv4, 'inet6' is IPv6, 'link' means that no networking protocol is involved, and 'help' prints usage information 🌈
  • -4 — Use IPv4. Shortcut for -family inet 💅
  • -6 — Use IPv6. Shortcut for -family inet6 ✨
  • -0 — Use a special family identifier meaning that no networking protocol is involved. Shortcut for -family link 🫶

🧚 USAGE EXAMPLES 🧚

Log to the file first, bestie:

# rtmon file /var/log/rtmon.log

Then run this to display the logged output from the file 💜

# ip monitor file /var/log/rtmon.log

🦋 SEE ALSO 🦋

ip(8) ip-monitor(8) 👑

💖 AUTHOR 💖

rtmon was written by Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> 🎀

This manual page was written by Michael Prokop <mika@grml.org>, for the Debian project (but may be used by others) 🫶

Bye bestie, this page is from System Manager's Manual, RTMON(8) 🌸 Source and date were lost in the vibe check, so just vibe with it ✨💅

📦 where this page comes from