BIOS and Firmware Updates Using Dell Linux Repository

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You can update your CentOS 6 system to the latest version or to a specific version of the BIOS and firmware available in the Dell Linux online repository. You can inventory your CentOS 6 system, scan the repository for matching firmware with newer version using repository management software such as yum.

Firmware-tools are used to update BIOS and firmware on your system. Using a repository management software, you can easily update your BIOS and firmware to the latest or specific versions on your system.

Setting Up/Bootstrapping the Repository

To setup/bootstrap the Dell Linux online repository on your CentOS 6 sever, run the following command at the command prompt:

The system is configured to access the Dell Linux online repository using supported repository management software. The Dell GPG keys and libsmbios (BIOS library) are also installed.

Installing Firmware Tools

Downloading Applicable Firmware

You can also inventory your system for the list of existing versions of BIOS and firmware using the following command:

Updating BIOS and Firmware Using CLI

Run the following command to inventory the system and scan the repository for new versions of components:

This command provides information about the existing versions of components on your system and the list of component versions that are available to be installed.

To install all applicable BIOS and firmware updates on your system, run the following command:

Once the devices are updated, the “Execution Success” message is displayed.

Automatically Update Firmware

By default, installing a BIOS or firmware RPM does not apply the update to the hardware. The update is manually applied using the update_firmware command. However, you can automatically update the hardware during RPM installation by configuring the /etc/firmware/firmware.conf file.

To automatically install BIOS and firmware updates, ensure that rpm_mode is set to auto in the firmware.conf file as shown:

Viewing Log Information

CentOS 6 Channel Bonding

centosCentOS 6 Channel Bonding allows administrators to bind multiple network interfaces together into a single channel using the bonding kernel module and a special network interface called a channel bonding interface. Channel bonding enables two or more network interfaces to act as one, simultaneously increasing the bandwidth and providing redundancy.

CentOS 6 Channel Bonding

Channel bonding (also known as “Ethernet bonding”) is a computer networking arrangement in which two or more network interfaces on a host computer are combined for redundancy or increased throughput.

mode=0 (Balance-rr) – This mode provides load balancing and fault tolerance.
mode=1 (active-backup) – This mode provides fault tolerance.
mode=2 (balance-xor) – This mode provides load balancing and fault tolerance.
mode=3 (broadcast) – This mode provides fault tolerance.
mode=4 (802.3ad) – This mode provides load balancing and fault tolerance.
mode=5 (balance-tlb) – Prerequisite: Ethtool support in the base drivers for retrieving the speed of each slave.
mode=6 (balance-alb) – Prerequisite: Ethtool support in the base drivers for retrieving the speed of each slave.
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Disable SELinux CentOS 6

You need to be aware that by disabling SELinux you will be removing a security mechanism on your CentOS system. Think about this carefully, and if your system is on the Internet and accessed by the public, then think about it some more.

Applications should be fixed to work with SELinux, rather than disabling the OS security mechanism.

You could even switch to Permissive mode where every operation is allowed. Operations that would be denied are allowed and a message is logged identifying that it would be denied.

If you really need to disable SELinux on CentOS 6 please consider the following:

SELinux Warning

Change SELINUX=enforcing

to SELINUX=disabled

This will disable SELinux on your next reboot.

Installing Bacula on CentOS 6

Installing Bacula on CentOS 6 with Webmin interface quick start guide. The assumption for this CentOS 6 tutorial is that you are running as root and have a basic understanding of the software required but if you follow this tutorial you should be able to complete the task successfully.

What is Bacula

Bacula is a set of Open Source, enterprise ready, computer programs that permit you (or the system administrator) to manage backup, recovery, and verification of computer data across a network of computers of different kinds. Bacula is relatively easy to use and efficient, while offering many advanced storage management features that make it easy to find and recover lost or damaged files. In technical terms, it is an Open Source, enterprise ready, network based backup program.

Bacula Website: http://www.bacula.org/en/
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