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 sections.
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
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.
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@owl.openwall.com>