Article Directory
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- 1. View the basic information of the network card: ifconfig
- 2. View wireless network device information: iwconfig
- Three, check the network card traffic: sar
- Four, check the network card model and quantity: lspci
- 5. Check the network card driver: ethtool and lspci
- Six, check the network card rate: ethtool
- Seven, display the information when the network card is loaded when the system is booted: dmesg
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1. View the basic information of the network card: ifconfig
ifconfig (network interfaces configuring)
is a command used to display or configure network devices in Linux.
:~> ifconfig
eth1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.5.1.1 netmask 255.255.255.19 broadcast 10.5.1.255
ether e8:4d:d0:b4:37:ad txqueuelen 1000 (Ethernet)
RX packets 483834396600 bytes 683233729924158 (621.3 TiB)
RX errors 0 dropped 20 overruns 0 frame 0
TX packets 95269964773 bytes 55409527168264 (50.3 TiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
loop txqueuelen 0 (Local Loopback)
RX packets 138146336 bytes 16565271947 (15.4 GiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 138146336 bytes 16565271947 (15.4 GiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
2. View wireless network device information: iwconfig
iwconfig is a command similar to ifconfig. It is
used to configure wireless network devices or display wireless network device information. It
is one of the user-level configuration tools of Linux Wireless Extensions (LWE).
However,
because CentOS does not install LWE by default, additional installation is required to use iwconfig.
Otherwise you will encounter this problem:
:~> iwconfig
-bash: iwconfig: command not found
The solution to this problem is very simple, just install wireless-tools:
//安装 wireless-tools
:~> yum install -y wireless-tools
Three, check the network card traffic: sar
sar,
System Activity Reporter, system activity report;
System activities can be reported from many aspects,
including: network card usage, file read and write, system call usage,
disk I/O, CPU efficiency, memory usage, process activities, and IPC-related activities.
//查看网卡流量，每秒输出一次，输出2次。
:~> sar -n DEV 1 2
Linux (testsvr) 03/05/2021 _x86_64_ (24 CPU)
05:59:30 PM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s
05:59:31 PM eth0 0.00 0.00 0.00 0.00 0.00 0.00 0.00
05:59:31 PM eth1 6527.00 827.00 9426.35 304.65 0.00 0.00 0.00
05:59:31 PM sit0 0.00 0.00 0.00 0.00 0.00 0.00 0.00
05:59:31 PM lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00
05:59:31 PM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s
05:59:32 PM eth0 0.00 0.00 0.00 0.00 0.00 0.00 0.00
05:59:32 PM eth1 59310.00 3147.00 87534.18 208.18 0.00 0.00 0.00
05:59:32 PM sit0 0.00 0.00 0.00 0.00 0.00 0.00 0.00
05:59:32 PM lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Average: IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s
Average: eth0 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Average: eth1 32918.50 1987.00 48480.27 256.41 0.00 0.00 0.00
Average: sit0 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Average: lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Four, check the network card model and quantity: lspci
lspci, that is, display all pci device information.
PCI is a kind of bus, and the devices connected through the PCI bus are PCI devices.
:~> lspci |grep Ethernet
02:00.0 Ethernet controller: Intel Corporation Ethernet Controller 10-Gigabit X540-AT2 (rev 01)
02:00.1 Ethernet controller: Intel Corporation Ethernet Controller 10-Gigabit X540-AT2 (rev 01)
:~> lspci -vvv |grep Ethernet
02:00.0 Ethernet controller: Intel Corporation Ethernet Controller 10-Gigabit X540-AT2 (rev 01)
02:00.1 Ethernet controller: Intel Corporation Ethernet Controller 10-Gigabit X540-AT2 (rev 01)
5. Check the network card driver: ethtool and lspci
Ethtool is a command used to query and set network card parameters.
The information it displays comes from the network card driver layer, which is the link layer of the TCP/IP protocol.
:~> ethtool -i eth1 | grep driver
driver: ixgbe
lspci, a command to display all pci device information.
:~> lspci -vvv | grep -A10 -B10 driver
...
02:00.1 Ethernet controller: Intel Corporation Ethernet Controller 10-Gigabit X540-AT2 (rev 01)
Subsystem: Intel Corporation Device 0000
Physical Slot: 0-2
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 64 bytes
Interrupt: pin B routed to IRQ 36
Region 0: Memory at 96000000 (64-bit, prefetchable) [size=2M]
Region 2: I/O ports at 2000 [size=32]
Region 4: Memory at 96400000 (64-bit, prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: ixgbe
...
Six, check the network card rate: ethtool
:~> ethtool eth1 | grep -i speed
Speed: 10000Mb/s
Seven, display the information when the network card is loaded when the system is booted: dmesg
:~> dmesg |grep -i eth
[ 6.859045] virtio_net virtio0 eth1: renamed from eth0
[ 9.976245] 8021q: adding VLAN 0 to HW filter on device eth1