Whether the Linux system comes with a network card driver. Linux system is driven by its own network card; The Linux kernel integrates drivers for most processors, sound cards, motherboards, and network cards.
Linux network card driver – Whether the Linux system comes with a network card driver
What is a network card in Linux?
A network card is a piece of computer hardware that allows computers to communicate over a computer network, allowing users to connect to each other via cable or wirelessly.
Network cards are also called network adapters, network interface cards, and WiFi adapters.
In the Linux operating system, the traditional naming of network card devices is eth0, eth1, eth2, etc., see the syntax of the network card model “lspci |” grep -i ether”, syntax for NIC resource usage “sar -n DEV”, syntax for NIC support multi-queue “lspci -vvv |” grep -i msi-x”。
Linux comes with a network card driver
A network card is a piece of computer hardware designed to allow computers to communicate over a computer network. Since it has a MAC address, it belongs between layers 1 and 2 of the OSI model. It allows users to connect to each other via cable or wirelessly.
Each network card has a unique 48-bit serial number called a MAC address, which is written in a ROM on the card.
Every computer on the network must have a unique MAC address.
Summary of the basics about network cards in Linux
1. Overview of the network card
The traditional naming method of network card devices of Linux operating system is eth0, eth1, eth2, etc., while CentOS7 provides different naming rules, which are assigned based on firmware, topology, and location information by default.
The advantage of this is that the naming is fully automated and predictable, and the disadvantage is that it is harder to read than eth0 and wlan0, such as ens33.
2. the difference between Eth0 and ens
ENO1: Represents the network card built into the BIOS by the host
Ens: Represents the PCI-E network card built into the motherboard BIOS
Enp2s0: PCI-E standalone NIC
eth0: If none of the above is used, go back to the default NIC name
3. Naming rule strategy
Rule 1:
For onboard device naming combined with the index number provided by the firmware or BIOS, name if the information from the firmware or BIOS is readable, such as eno1, this naming is relatively common, otherwise rule 2 is used.
Rule 2:
Name the PCI-E hot-plug port index number provided by the merge firmware or BIOS, such as ens1, and use if the information is readable, otherwise rule 3 is used.
Rule 3:
Naming the physical location of the merged hardware interface, such as enp2s0, is available and named as soon as it fails, directly to scenario 5.
Rule 4:
The MAC address of a named coalesced interface, such as enx78e7d1ea46da, is not used by default unless the user chooses to use this scheme.
Rule 5:
With the traditional scheme, if all schemes fail, use a style like eth0.
4. Character meaning of network card name
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The meaning of the first 2 characters
en Ethernet Ethernet
WL AN WLAN
ww wireless WAN WWAN
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The third character is selected according to the device type
o<index> on-board device index number
s<slot> hotplug slot index number
x<MAC> MAC address
p<bus>s<slot> PCI geographical location
p<bus>s<slot> USB port number chain
Whether the Linux system comes with a network card driver
This article mainly introduces “whether the Linux system comes with its own network card driver”, in the daily operation, I believe that many people have doubts about whether the Linux system comes with its own network card driver.
Wi-Fi8.CN consulted various materials, sorted out a simple and easy-to-use operation method, I hope to answer the “Linux system comes with its own network card driver” doubts will help! Next, please follow the editor to learn!
Linux driver is the full name of Linux kernel driver; Linux driver in a broad sense refers to the program code that operates the hardware and makes the hardware work, this code is called the hardware driver, and in the narrow sense, it refers to the part of the code used in the operating system to control the logic method of the hardware.
The Linux kernel integrates drivers for most processors, sound cards, motherboards, and network cards, without installation.
Linux driver is the full name of Linux kernel driver.
The understanding of Linux drivers can be divided into two broad and narrow senses.
Linux driver in a broad sense refers to the program code that operates the hardware and makes the hardware work, which is called the hardware driver.
But in bare metal development we often hear bare metal drivers, in fact, strictly speaking, there is no operating system is no driver concept, if you have to say bare metal drivers, it also refers to the part of the program that operates the hardware in the bare metal.
Linux drivers are narrowly defined as the part of the code in the operating system that is used to control the logical methods of the hardware.
We can understand this definition from the following two aspects:
(1) There are many kinds of operating systems, Windows has Windows driver, iOS has iOS driver, Android has Android driver, and Linux driver is for Linux operating system platform.
(2) Linux drivers are only a part of the kernel, in addition to this part used to control the hardware, there are also file systems, memory management, kernel scheduling and other content.
