| ip-monitor(8) - phpMan
IP-MONITOR(8) Linux IP-MONITOR(8)
NAME
ip-monitor, rtmon - state monitoring
SYNOPSIS
ip [ ip-OPTIONS ] monitor [ all | OBJECT-LIST ] [ file FILENAME ]
DESCRIPTION
The ip utility can monitor the state of devices, addresses and routes continuously. This
option has a slightly different format. Namely, the monitor command is the first in the
command line and then the object list follows:
ip monitor [ all | OBJECT-LIST ] [ file FILENAME ]
OBJECT-LIST is the list of object types that we want to monitor. It may contain link,
address, route, mroute, prefix, neigh and netconf. If no file argument is given, ip opens
RTNETLINK, listens on it and dumps state changes in the format described in previous sec‐
tions.
If the file option is given, the program does not listen on RTNETLINK, but opens the given
file, and dumps its contents. The file should contain RTNETLINK messages saved in binary
format. Such a file can be generated with the rtmon utility. This utility has a command
line syntax similar to ip monitor. Ideally, rtmon should be started before the first net‐
work configuration command is issued. F.e. if you insert:
rtmon file /var/log/rtmon.log
in a startup script, you will be able to view the full history later.
Nevertheless, it is possible to start rtmon at any time. It prepends the history with the
state snapshot dumped at the moment of starting.
SEE ALSO
ip(8)
AUTHOR
Original Manpage by Michail Litvak <mci AT owl.com>
iproute2 13 Dec 2012 IP-MONITOR(8)
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