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Questions[device](server)

Martin Hope
GP92
Asked: 2018-01-15 03:58:57 +0800 CST
  • 17

I am trying to understand the configuration of nvme.

But I do not understand why there are two devices: nvme block and nvme character device:

crw------- 1 root root 243, 0 Dec 12 16:09 /dev/nvme0
brw-rw---- 1 root disk 259, 0 Jan 14 01:30 /dev/nvme0n1

What is the purpose of each or when to use them?

device
Martin Hope
John R
Asked: 2012-05-01 07:02:50 +0800 CST
  • 15

I want to incorporate into a piece of software the ability to look up a manufacturer based on a mac address. By googling "mac address lookup" and similar, I have noticed several websites that make this correlation which suggests this data source is available somewhere. Where can I find this data source that correlates a mac address (input) with a manufacturer (output)?

networking mac-address device
Martin Hope
dannymcc
Asked: 2011-11-11 03:35:11 +0800 CST
  • 11

We have had a BT engineer visit recently, trying to solve a problem with our IP phone system.

One point they made was that we had four DHCP servers running on the network. I have disabled two of them (one of them should be running) and tested everything is working as it should. However, the fourth DHCP server eludes me!

The device has an IP address of 192.168.1.59, I can successfully ping the IP address.

If I run 'nbtstat -a 192.168.1.59' I get the following result:

$ nbtstat -a 192.168.1.59
$ Local Area Connection:
$ Node IpAddress: [192.168.1.45] Scope Id: []
$ Host not found.

If I run RDP or VNC Viewer for the IP address they don't connect.

Is there any other way I can find out more about the device?

networking ping device
Martin Hope
cd1
Asked: 2010-10-26 05:34:19 +0800 CST
  • 8

I need to find out if a disk is IDE or SATA (or anything else, maybe). I know that the device is /dev/sda, so I think it's SATA, but I don't know if I can be sure just by the name. I tried looking at dmesg and it always says "SCSI", but I'm sure it's not...

any ideas?

hard-drive sata ide device
Martin Hope
regulatre
Asked: 2010-05-13 14:17:16 +0800 CST
  • 8

How do I find out which kernel module (as seen by typing lsmod) is servicing a particular device in /dev ?

In other words, say I have a device, /dev/mouse0 and I want to find out which kernel module is installed to service that device. How do I do that?

Another way to look at this is, some loaded kernel modules associate themselves with a device in /dev. How does one find out which device(s) a module is "attached" to?

linux drivers kernel-modules device