Options used with linux dmidecode command<\/h3>\n
Unlike most commands in Linux, the dmidecode command comes with very few options that specify how the dmidecode command must function, format, and print the output. Let us take a detailed look at each of these options.<\/p>\n
1. -d<\/strong><\/p>\n This option reads memory from the file specified. If you don\u2019t specify any file, the default will be taken as \u201c\/dev\/mem\u201d. You can also write this option as \u201c–dev-mem\u201d<\/p>\n 2. -q<\/strong><\/p>\n This option enables quiet mode, meaning that there will be less output displayed on the screen. This option also suppresses error messages. You can also write this option as \u201c–quiet\u201d<\/p>\n 3. -s<\/strong><\/p>\n This option displays only the values of the specified DMI string. You can also write this option as \u201c–string\u201d<\/p>\n 4. -t<\/strong><\/p>\n This option displays only the entries of the specified type. You can also write this option as \u201c–type\u201d<\/p>\n 5. -u<\/strong><\/p>\n This option does not decode the entries. You can also write this option as \u201c–dump\u201d<\/p>\n 6. -h<\/strong><\/p>\n This option prints the help menu of the dmidecode command as shown:<\/p>\n 7. -V<\/strong><\/p>\n This option displays the information regarding the version of the dmidecode command you are using on your PC as shown:<\/p>\n Before we look at some practical examples of the dmidecode command, let us understand the output of the dmedicode command. The dmidecode command contains 5 fields of information.<\/p>\n 1. Handle:<\/strong><\/p>\n The handle is a unique identifier that allows records to reference each other.<\/p>\n 2. Decoded values:<\/strong><\/p>\n The decoded values contain the information depending on the type of record<\/p>\n 3. Type:<\/strong><\/p>\n The type provides information about computer elements such as system, baseboard, chassis, processor, and so much more.<\/p>\n 4. Size:<\/strong><\/p>\n As the name suggests, It shows the size of each record. Each record contains a 4-byte header<\/p>\n 5. Bios information:<\/strong><\/p>\n This field displays information that includes the details of the vendor, version, release date, ROM size, etc.<\/p>\n Now, since we have covered the theory and fundamentals regarding the demidecode command, let us look at some fantastic examples of the dmidecode command in the terminal of ubuntu 20.04.<\/p>\n If you want to read memory from the device file (\/dev\/mem), run the dmidecode along with the option \u201c-d\u201d as shown:<\/p>\n As we discussed above, the \u201cTYPE\u201d field can be either a DMI type number, a comma-separated list of type numbers, or a keyword. If you want to know what types are supported, you can simply execute the below command:<\/p>\n If you wish to get more information on a specific component, you can get hold of its type ID and execute the dmidecode by pairing it with the option \u201c-t\u201d followed by the type ID as shown in the syntax below:<\/p>\n If you want information about the BIOS of your system, run the dmidecode command by combining it with the option \u201c–type\u201d followed by the word \u201cBIOS\u201d as shown in the syntax below:<\/p>\n If you want information about your system, run the dmidecode command by combining it with the option \u201c–type\u201d followed by the word \u201csystem\u201d as shown in the syntax below:<\/p>\n If you want information about your baseboard, run the dmidecode command by combining it with the option \u201c–type\u201d followed by the word \u201cbaseboard\u201d as shown in the syntax below:<\/p>\n If you want information about your chassis, run the dmidecode command by combining it with the option \u201c–type\u201d followed by the word \u201cchassis\u201d as shown in the syntax below:<\/p>\n If you want to print information using DMI string keywords, use the option \u201c-s\u201d followed by the keyword as shown:<\/p>\n However, if you don\u2019t specify any DMI string keyword, the command simply prints the list of valid keywords and exits with an error message.<\/p>\n To get the version of the BIOS in your system, use following command<\/p>\n If you want to get the release date of the BIOS in your system, use the following command:<\/p>\n To get the product name on which the Linux server is installed, use the following command:<\/p>\n To get the serial number of the hardware on which the Linux server is installed, use the following command:<\/p>\n If you want to get the details of the processor available on your Linux server use the following command:<\/p>\n If you want to get the processor frequency of the processor used in your Linux server use the following command:<\/p>\n Yup! We can even hide some information in the output of the dmidecode by enabling quiet mode. To enable it, all we have to do is run the dmidecode command along with the option \u201c-q\u201d.<\/p>\n If display the string values in both hexadecimal and ASCII, execute the dmidecode command along with the option \u201c-u\u201d<\/p>\n![\"help](\"https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2023\/01\/help-menu-of-demidecode-command.webp\")
<\/a><\/p>\n<\/a><\/p>\nUnderstanding output of linux dmidecode command<\/h3>\n
Reading memory from device file in linux<\/h3>\n
sudo dmidecode -d <file path><\/pre>\n
<\/a><\/p>\nListing the available TYPE<\/h3>\n
dmidecode --type<\/pre>\n
<\/a><\/p>\nDisplaying the information using type ID<\/h3>\n
sudo dmidecode -t <type ID><\/pre>\n
<\/a><\/p>\nDisplaying the information about BIOS<\/h3>\n
sudo dmidecode --type bios<\/pre>\n
<\/a><\/p>\nPrinting system information<\/h3>\n
sudo dmidecode --type system<\/pre>\n
<\/a><\/p>\nPrinting baseboard information<\/h3>\n
sudo dmidecode --type system<\/pre>\n
<\/a><\/p>\nPrinting chassis information<\/h3>\n
sudo dmidecode --type chassis<\/pre>\n
<\/a><\/p>\nDisplaying information using DMI keywords<\/h3>\n
sudo dmidecode -s <KEYWORD><\/pre>\n
<\/a><\/p>\n<\/a><\/p>\nGetting the BIOS version<\/h3>\n
dmidecode --string bios-version<\/pre>\n
<\/a><\/p>\nGetting the BIOS release date<\/h3>\n
dmidecode --string bios-release-date<\/pre>\n
<\/a><\/p>\nGetting system product name of the Linux hardware<\/h3>\n
dmidecode --string system-product-name<\/pre>\n
<\/a><\/p>\nGetting the serial number of the Linux hardware<\/h3>\n
dmidecode --string system-serial-number<\/pre>\n
<\/a><\/p>\nGetting the process information of the Linux hardware<\/h3>\n
dmidecode --string processor-version<\/pre>\n
Getting the process frequency of the Linux hardware<\/h3>\n
dmidecode --string processor-frequency<\/pre>\n
Hiding information in the output<\/h3>\n
<\/a><\/p>\nDumping information as hexadecimal<\/h3>\n