rtmon
listens to and monitors RTnetlink
see also :
ip
Synopsis
rtmon [
options ] file FILE [ all | LISTofOBJECTS ]
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examples
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description
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.
options
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.
usage examples
# 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.
see also
ip
author
rtmon
was written by Alexey Kuznetsov
<kuznet[:at:]ms2.inr.ac[:dot:]ru>.
This manual
page was written by Michael Prokop <mika[:at:]grml[:dot:]org>,
for the Debian project (but may be used by others).