08-11-2011
Disclaimer: It has been approximately 7 years since I used Linux regularly. However, I would be surprised if any of what follows is no longer applicable.
You should be aware that dmesg simply prints out the contents of a kernel log buffer. It is a ring buffer and it's not very large. New messages overwrite older ones once the buffer has been filled. If your kernel is feeling chatty, you could very well miss messages if you depend on dmesg.
dmesg can be convenient to check the latest kernel messages, but I would not consider it a comprehensive reporting tool in and of itself. For that you need to look elsewhere.
For example, soon after booting a linux machine, dmesg will print out all the startup messages spat out by the kernel during its initialization and hardware detection routines. Try dmesg a day later (or a minute later if the kernel has encountered some issue) and it's possible that the boot messages are now gone (they should still be available in a log file, even if they've been overwritten in the kernel buffer read by dmesg).
Regards,
Alister
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LEARN ABOUT DEBIAN
rhn-profile-sync
RHN-PROFILE-SYNC(8) Red Hat, Inc. RHN-PROFILE-SYNC(8)
NAME
rhn-profile-sync - Update system information on Red Hat Network.
SYNOPSIS
rhn-profile-sync [options]
DESCRIPTION
rhn-profile-sync is a client program that connects to Red Hat Network (or a Red Hat Network Satellite) and refreshes the data stored for
this system.
rhn-profile-sync updates data about installed packages, machine hardware, and virtual guest instances (if virtualization is enabled).
OPTIONS
-v, --verbose
Increase the debugging output.
--proxy=PROXY
Specify an http proxy to use.
--proxyUser=PROXYUSER
Specify a username to use for an authenticated proxy. This option must be used in conjunction with proxyPassword.
--proxyPassword=PROXYPASSWORD
Specify a password to use for an authenticated proxy. This option must be used in conjunction with proxyUser.
--version
Show the program's version number and exit.
-h, --help
Show a help message and exit.
FILES
/etc/sysconfig/rhn/up2date
The common configuration file used by RHN client programs.
SEE ALSO
rhn_check(8), rhn_register(8), rhnreg_ks(8), rhnsd(8), up2date(5).
AUTHORS
See the AUTHORS file included with this software.
This manual page was written by James Bowes <jbowes@redhat.com>
BUGS
Report bugs to <http://bugzilla.redhat.com>.
COPYRIGHT
Copyright (C) 1999-2010 Red Hat, Inc.
This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
LAR PURPOSE.
Linux 2010 August 30 RHN-PROFILE-SYNC(8)