How to read the value of cmos in centos

To read CMOS values ​​in CentOS, follow these steps: Install the dmidecode tool. Run the dmidecode command to obtain information about your computer's hardware, including CMOS values. Look for the "Chassis Settings" or "System BIOS" section in the output, which contains information about CMOS settings.

How to read CMOS values ​​in CentOS

CMOS (Complementary Metal-Oxide-Semiconductor) stores basic settings of the computer, such as date , time, hardware configuration, etc. In CentOS, the CMOS value can be read by following these steps:

Step 1: Install the dmidecode tool

dmidecode is a command line tool used to display information about the system hardware information, including CMOS settings. If it is not installed, you can install it using the following command:

<code class="bash">sudo yum install dmidecode</code>

Step 2: Run the dmidecode command

Run the dmidecode command to get detailed information about your computer hardware, including CMOS values .

<code class="bash">sudo dmidecode -t bios</code>

Step 3: Find the CMOS value

In the dmidecode output, look for the section that contains "Chassis Settings" or "System BIOS". These sections contain information about CMOS settings.

Sample output:

<code class="bash">BIOS Information
    Vendor: American Megatrends Inc.
    Version: P07.C
    Release Date: 04/15/2014
    ROM Size: 64 MBytes
Chassis Information
    Manufacturer: Dell Inc.
    Version: 0.1
    Type: Rack-Mountable
    Lock: Present</code>

Notes:

• Some motherboards may not expose all CMOS settings to dmidecode.
• If you are unable to read the required CMOS values ​​from dmidecode, you can try other tools such as hdparm or ipmitool.

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