NAME¶
ip-monitor, rtmon - state monitoring
SYNOPSIS¶
ip monitor [
all |
LISTofOBJECTS ]
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 |
LISTofOBJECTS ]
OBJECT-LIST is the list of object types that we want to monitor. It may
contain
link,
address and
route. If no
file
argument is given,
ip opens RTNETLINK, listens on it and dumps state
changes in the format described in previous sections.
If a file name is given, it does not listen on RTNETLINK, but opens the file
containing RTNETLINK messages saved in binary format and dumps them. Such a
history 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 network 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.
Certainly, 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@owl.openwall.com>
