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IP\-MONITOR

Section: Linux (8)
Updated: 13 Dec 2012
Index Return to Main Contents
 

NAME

ip-monitor, rtmon - state monitoring  

SYNOPSIS


ip [ ip-OPTIONS ] monitor [ all | OBJECT-LIST ] [ file FILENAME ] [ dev DEVICE ]

 

OPTIONS

-t, -timestamp
Prints timestamp before the event message on the separated line in format:
    Timestamp: <Day> <Month> <DD> <hh:mm:ss> <YYYY> <usecs> usec
    <EVENT>

-ts, -tshort
Prints short timestamp before the event message on the same line in format:
    [<YYYY>-<MM>-<DD>T<hh:mm:ss>.<ms>] <EVENT>

 

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 ] [ dev DEVICE ]

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.

If the dev option is given, the program prints only events related to this device.

 

SEE ALSO


ip(8)

 

AUTHOR

Original Manpage by Michail Litvak <mci@owl.openwall.com>


 

Index

NAME
SYNOPSIS
OPTIONS
DESCRIPTION
SEE ALSO
AUTHOR


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