Here is a fun command we use at the office that makes extracting hardware info from a remote machine easy as pie. It’s called dmidecode and it can be quite useful. Here is one section of the information it can provide, extracted from one of my servers(some bits removed):

 Handle 0x0100
    DMI type 1, 27 bytes.
    System Information
            Manufacturer: Dell Inc.
            Product Name: PowerEdge 1950
            Version: Not Specified
            Serial Number: XXXXXX
            UUID: XXXXXXXXXXXXXXXXXXXX
            Wake-up Type: Power Switch

You are, unfortunately, at the mercy of the hardware manufacturer for accuracy of the hardware information, but thus far I’ve found it to be accurate.

Enjoy.