What Hardwarwe Do I Have

Source : http://www.linuxjournal.com/content/what-hardware-do-i-have
Nov 18, 2010  By Joey Bernard

Often you may not necessarily know what kind of hardware you have—you may have a no-name box from a smaller company or a used machine. This month, I present the tools you can use to find out what you have installed.
First up is lshw. This utility LiSts HardWare (lshw). If you run it as a regular user, it actually warns you to run it as root. So go ahead and run sudo lshw. You should see screens of information for your system. The first section will be general information and should look something like this:

jbernard-eeepc            
    description: Notebook
    product: 700
    vendor: ASUSTeK Computer INC.
    version: 0129
    serial: EeePC-1234567890
    width: 32 bits
    capabilities: smbios-2.5 dmi-2.5 smp-1.4 smp
    configuration: boot=normal chassis=notebook 
    ↪cpus=1 uuid=XXXXXX-XXXXX-XXXXX-XXXXX

This is what I get when I run it on my little ASUS EeePC. Right away you can find the manufacturer of this little beast (ASUSTeK), the BIOS version (0129), and the fact that it's a 32-bit machine with one CPU. More information is broken down into the following categories:

core
   firmware - motherboard and BIOS information
   cpu - CPU information
      cache - cache information
   memory - memory information
      bank - specific bank memory information
   pci - PCI bus information
      display - PCI display adapter
      multimedia - PCI audio adapter
      pci - other PCI devices
      network - PCI network adapter
   usb - USB devices
   ide - IDE information
      disk - individual disks
         volume - volumes on this disk

For an idea on how much information is available, the main memory section shows this about my EeePC:

*-memory
     description: System Memory
     physical id: 1f
     slot: System board or motherboard
     size: 512MiB
   *-bank
        description: DIMM DDR2 Synchronous 400 MHz (2.5 ns)
        product: PartNum0
        vendor: Manufacturer0
        physical id: 0
        serial: SerNum0
        slot: DIMM0
        size: 512MiB
        width: 64 bits
        clock: 400MHz (2.5ns)

This utility is basically an all-in-one tool that spits out everything on your system in one go. But, what if you want information only about specific subsystems in your machine? An entire suite of utilities exists for this, and they might be more useful when you need some specific piece of information or want to do some system querying in a script.
You may want to look at the CPU. The lscpu utility provides output similar to the following:

Architecture:          i686
CPU op-mode(s):        32-bit
CPU(s):                1
Thread(s) per core:    1
Core(s) per socket:    1
CPU socket(s):         1
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 13
Stepping:              8
CPU MHz:               571.427

From this, you can see the manufacturer, whether it's 32-bit or 64-bit, the exact version and model, as well as the current CPU frequency.
If you want to know whether your video card is supported by X11, or whether you need to find a third-party driver, you can use lspci. This utility gives a list of all the devices plugged in to your PCI bus. The output looks something like this:

00:02.0 VGA compatible controller: Intel Corporation 
 ↪Mobile 915GM/GMS/910GML Express Graphics Controller (rev 04)
00:02.1 Display controller: Intel Corporation 
 ↪Mobile 915GM/GMS/910GML Express Graphics Controller (rev 04)

This information shows that the video controller in my EeePC is an Intel controller. So, if you wanted, you now could search Google with this information to learn about your video card and how best to configure it. If you want to see what USB devices are on your system, use lsusb. On my EeePC, I have an SD card installed, and it shows up as this:

Bus 001 Device 002: ID 0951:1606 Kingston Technology 

If you're interested in the disk subsystem, you can find out what your system has with the blkid utility. This utility prints out all the available filesystems, with the following output format:

/dev/sda1: UUID="XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX" TYPE="ext2" 
/dev/sda2: UUID="XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX" TYPE="swap" 
/dev/sda3: UUID="XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX" TYPE="ext2" 
/dev/sdb1: UUID="XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX" TYPE="ext2" 

With this utility, you can learn what devices are available and what filesystems are being used on them. The associated UUIDs also are available if you want to use them in the entries in /etc/fstab.
Now that you know what kind of hardware you have on your system, the last thing to check is to see whether your kernel actually is using the available hardware. On most modern distributions, the kernel is compiled to use modules. You can check to see which modules are loaded by using the lsmod command. You will get a list that looks like this:

agpgart                31788  2 drm,intel_agp
lp                      7028  0 
video                  17375  1 i915
output                  1871  1 video

You can see that the agpgart module has a size of 31788 bytes and is used by the drm and intel_agp modules.
Now, hopefully, you can configure and optimize your hardware so that you get the most out of it. If you find other utilities not covered here, I would love to hear about them.