Unregistering a RHEL machine
The only thing required to unregister a machine is to run the unregister command. This removes the system’s entry from the subscription service, unsubscribes it from any subscriptions, and, locally, deletes its identity and entitlement certificates.
In the Red Hat Subscription Manager GUI, there is an Unregister button in the top right corner of the window.
From the command line, this requires only the unregister command.
Unregistering a Consumer
[root@server1 ~]# subscription-manager unregister
RHEL new packages: crash-gcore-command
New crash-gcore-command packages are now available for Red Hat Enterprise Linux 6.
The crash-gcore-command extension module is used to dynamically add a gcore command to a running crash utility session on a kernel dumpfile. The command will create a core dump file for a specified user task program that was running when a kernel crashed. The resultant core dump file may then be used with gdb.
This enhancement update adds the crash-gcore-command packages to Red Hat Enterprise Linux 6.
All users who require the crash-gcore-command should install these new packages
Support for device identification using WWIDs during installation
Fibre Channel and Serial Attach SCSI (SAS) devices can be now specified by a World Wide Name (WWN) or a World Wide Identifier (WWID) for unattended installations. WWN is part of the IEEE standard which makes it easier to identify storage devices during installation for users utilizing Storage Area Networks (SAN) and other advanced network topologies. When a storage device is attached to a server using multiple physical paths for redundancy or improved performance, WWN for any of these paths is sufficient to identify the device.
Disable ipv6 on RHEL 4 and 5
Edit /etc/sysconfig/network and change
NETWORKING_IPV6=yes to
NETWORKING_IPV6=no
Edit /etc/modprobe.conf and add these lines (if they’re not in it):
alias net-pf-10 off
alias ipv6 off
Stop the ipv6tables service by typing:
Disable the ipv6tables service by typing:
IPv6 will be disabled after the next reboot of the system.
How do I install flash plugin for Firefox in RHEL
The easiest way to download and install the flash plugins to your Red Hat Enterprise Linux system would be to run the following command.
Red Hat Enterprise Linux 5
