NAME
rhn_check - check for queued actions on RHN and execute them
SYNOPSIS
/usr/sbin/rhn_check [-v] [--verbose]
DESCRIPTION
rhn_check is a client program that connects to the Red Hat Network backend servers and retrieves information associated with the queued actions for this particular system. This script reads the digital server ID from /etc/sysconfig/rhn/systemid and uses that to identify the machine to the Red Hat Network. Upon successfull authentication, rhn_check will start processing the queued actions sequentially.
ACTION TYPES
The following types of actions are currently processed by rhn_check:
| action type | description |
| refresh | This action will refresh the hardware or software profiles of this |
| machine with Red Hat Network. This fucntion is called as | |
| refresh(hardware) or refresh(rpmlist) | |
| new_systemid | This action is used by the RHn Backend to update the Digital |
| system ID of this machine with a new one. | |
| update_packages | This action will trigger rhn_check into running a package |
| update for a list of packages queued from the Red Hat Network. | |
| rhn_check will use modules from the up2date client to download | |
| the packages, solve dependencies and install the on the system. |
SEE ALSO
man pages for up2date(8) and rhnsd(8).
原文：http://www.cnblogs.com/oskb/p/3837904.html
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