8
votes
Accepted
How to find network card details on RHEL machines
For getting the brand/model of the network card, usually you run:
$ lspci | grep -i Ethernet
02:01.0 Ethernet controller: Intel Corporation 82545EM Gigabit Ethernet Controller (Copper) (rev 01)
Or ...
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6
votes
Accepted
how to verify number of disks in RAID but from OS
The mdadm command will handle Linux Software RAID only. In case of hardware RAID, such as your Dell PERC FD33xD / LSI MegaRAID SAS-3 3108, you'll need a tool that will be able to communicate with the ...
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4
votes
How to reliably tell from Linux whether the CPU supports Hyperthreading, even if Hyperthreading is disabled?
As you surmise, the ht flag isn’t a reliable indicator: it doesn’t signify hyper-threading support, it indicates “that the physical package is capable of supporting Intel Hyper-Threading Technology ...
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3
votes
Accepted
How can I find the Serial number on a Lenovo machine?
You can find the serial number of your machine by using dmidecode,
For the system, which is likely what you want,
sudo dmidecode -t system | grep Serial
For the motherboard,
sudo dmidecode -t ...
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3
votes
Accepted
Xen Server: Free memory != dmidecode -t17 output
total_memory : 16292
free_memory : 8278
in xl info’s output shows that Xen is using all the available memory, but not in the way you’re expecting: it’s seeing all 16GiB, but has ...
- 481k
3
votes
Accepted
how to know if disks are from Jbod or integral as part of the HW machine
You can try hdparm -i {device}, like:
# hdparm -i /dev/sda
/dev/sda:
Model=SAMSUNG MZ7TD512HAGM-000L1, FwRev=DXT05L0Q,
SerialNo=S151NYADA01701
Config={ Fixed }
RawCHS=16383/16/63, TrkSize=0, ...
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3
votes
2
votes
Accepted
How linux put SMBIOS information to /dev/mem?
/dev/mem provides access to all physical address space. The BIOS firmware is part of this address space (your computer must have some code to run during power-up).
So Linux "did not copy SMBIOS ...
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2
votes
Accepted
Filter dmidecode memory controller for supported speeds
This will list the supported speeds:
dmidecode | awk '/^\t[^\t]/ { speeds = 0 }; /^\tSupported Speeds:/ { speeds = 1 } /^\t\t/ && speeds'
This works by matching lines as follows:
lines ...
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2
votes
dmidecode reveals something with Internal Reference Designator: NUDE
It probably refers to the Node connector, that would pass hardware monitoring information (fan speeds, temperatures etc.) from a compatible PSU or fan extension card. It's (briefly) described on page ...
- 114k
2
votes
Accepted
How to redirect an error message to /dev/null?
As Wildcard commented, you've mistakenly redirected grep's stderr instead of sudo/dmidecode's. Use this instead:
sudo dmidecode 2>/dev/null | grep State
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2
votes
Reconstructing dmidecode binary dump from /sys/firmware/dmi/tables
You can ref code from https://github.com/mirror/dmidecode/blob/master/dmidecode.c . Good luck for you.
Example:
7f + 00 + 80 + 30 + 7b = 18a
18a hold 8bit = 8a
New address of DMI is hard coded to ...
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2
votes
Accepted
Can I relate a USB device from /sys to a particular USB connector from Dmidecode?
The output of dmidecode is based on SMBIOS data.
Here is apparently-latest version of the SMBIOS specification, as of this writing.
The lower half of page 70 describes the data structure for the port ...
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2
votes
Accepted
Maximum RAM - do I listen to dmidecode or the manufacturer?
Ecample: 4 socket supermicro server with 512GB of installed RAM, which is done via 32 x 16gb DIMMS.
dmidecode | grep "Maximum Capacity"
Maximum Capacity: 384 GB
Maximum Capacity: 384 ...
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2
votes
Maximum RAM - do I listen to dmidecode or the manufacturer?
The real question is not dmidecode itself being trustworthy but whether the information it reads is actually reliable or not. As quoted in your question, dmidecode does not effectively scan your ...
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2
votes
Accepted
Enabling an on board device from within a Linux system
I don't know if it's possible to activate it through your OS.
If not, I would first remove the GPU and see if that's why the onboard graphics are deactivated.
On some motherboards, the integrated ...
1
vote
how can I change device product name printed in dmidecode command?
If the application relies only on dmidecode to get its information, you could replace it with a script that outputs the information from the old system.
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1
vote
How to find network card details on RHEL machines
You can use ethtool which give you more info about your card, and also control network driver and hardware settings.
e.g:
# ethtool enp0s31f6
Settings for enp0s31f6:
Supported ports: [ TP ]
...
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1
vote
Why does dmidecode show the memory type as "unknown"?
Quoting David Schwartz:
The dmidecode program gives you the DMI information as reported by the
BIOS. It is as accurate as the BIOS makes it. Inaccuracies are common.
You will have to find a ...
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1
vote
Accepted
What does "OEM strings" mean in dmidecode output?
OEM Strings are free-form information stored in the System Management BIOS (see the spec for details). The values themselves don’t matter (much), however you wouldn’t expect them to change when fans ...
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