rtmon - listens to and monitors RTnetlink
rtmon [ options ] file FILE [ all | LISTofOBJECTS ]
This manual page documents briefly the rtmon command.
rtmon listens on netlink socket and monitors routing
table changes.
rtmon can be started before the first network configuration
command is issued. 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.
rtmon supports the following options:
- -Version
- Print version and exit.
- help
- Show summary of options.
- file FILE [ all |
LISTofOBJECTS ]
- Log output to FILE. LISTofOBJECTS 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.
- # rtmon file /var/log/rtmon.log
- Log to file /var/log/rtmon.log, then run:
- # ip monitor file /var/log/rtmon.log
- to display logged output from file.
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).