Manual: rtmon

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

NAME
       rtmon - 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
       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 | OBJECTS ]
	      Log  output  to FILE. OBJECTS is the list of object types that we want to monitor. It may con‐
	      tain '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 pro‐
	      tocol 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(8) ip-monitor(8)

AUTHOR
       rtmon was written by Alexey Kuznetsov .

       This manual page was written by Michael Prokop , for the Debian project  (but  may  be
       used by others).

												    RTMON(8)