eno2我在 Debian Stretch 上错误地配置了一个接口，现在我将其删除了/etc/network/interfaces，现在是这样：
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
allow-hotplug eno1
iface eno1 inet dhcp
# IPv6 interface
iface eno1 inet6 static
address ****:****:****::1
netmask 48
因此，该ifconfig命令显示这些接口：
docker0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 172.17.0.1 netmask 255.255.0.0 broadcast 172.17.255.255
ether 02:42:63:12:47:a0 txqueuelen 0 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
eno1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet ***.***.***.*** netmask 255.255.255.0 broadcast ***.***.***.***
inet6 ****:****:****::* prefixlen 48 scopeid 0x0<global>
inet6 fe80::ec4:7aff:fe0e:c7ee prefixlen 64 scopeid 0x20<link>
ether **:**:**:**:**:** txqueuelen 1000 (Ethernet)
RX packets 1430101 bytes 213249567 (203.3 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 3066573 bytes 4160098195 (3.8 GiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device memory 0xdf120000-df13ffff
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 950165 bytes 317274829 (302.5 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 950165 bytes 317274829 (302.5 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
但是如果它不再存在，也会ip link show显示界面：eno2
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
link/ether **:**:**:**:**:** brd ff:ff:ff:ff:ff:ff
3: eno2: <BROADCAST,MULTICAST> mtu 1500 qdisc mq state DOWN mode DEFAULT group default qlen 1000
link/ether **:**:**:**:**:** brd ff:ff:ff:ff:ff:ff
4: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default
link/ether **:**:**:**:**:** brd ff:ff:ff:ff:ff:ff
我尝试使用删除未配置的接口ip link delete eno2，但它返回错误RTNETLINK answers: Operation not supported
我怎样才能eno2从中删除接口ip link show？
更新：该ispconfig -a命令实际上显示了 eno2 接口，但是这个网卡在系统中物理上并不存在，这就是我想要删除它的原因。
更新2：命令输出lspci：
00:00.0 Host bridge: Intel Corporation Atom processor C2000 SoC Transaction Router (rev 02)
Flags: bus master, fast devsel, latency 0
00:01.0 PCI bridge: Intel Corporation Atom processor C2000 PCIe Root Port 1 (rev 02) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 24
Memory at df180000 (64-bit, non-prefetchable) [size=128K]
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
Capabilities: [40] Express Root Port (Slot+), MSI 00
Capabilities: [80] Power Management version 3
Capabilities: [88] Subsystem: Super Micro Computer Inc Atom processor C2000 PCIe Root Port 1
Capabilities: [90] MSI: Enable+ Count=1/1 Maskable+ 64bit-
Capabilities: [100] Advanced Error Reporting
Kernel driver in use: pcieport
Kernel modules: shpchp
00:02.0 PCI bridge: Intel Corporation Atom processor C2000 PCIe Root Port 2 (rev 02) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 25
Memory at df160000 (64-bit, non-prefetchable) [size=128K]
Bus: primary=00, secondary=02, subordinate=03, sec-latency=0
I/O behind bridge: 0000d000-0000dfff
Memory behind bridge: de000000-df0fffff
Capabilities: [40] Express Root Port (Slot+), MSI 00
Capabilities: [80] Power Management version 3
Capabilities: [88] Subsystem: Super Micro Computer Inc Atom processor C2000 PCIe Root Port 2
Capabilities: [90] MSI: Enable+ Count=1/1 Maskable+ 64bit-
Capabilities: [100] Advanced Error Reporting
Kernel driver in use: pcieport
Kernel modules: shpchp
00:03.0 PCI bridge: Intel Corporation Atom processor C2000 PCIe Root Port 3 (rev 02) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 26
Memory at df140000 (64-bit, non-prefetchable) [size=128K]
Bus: primary=00, secondary=04, subordinate=04, sec-latency=0
Capabilities: [40] Express Root Port (Slot+), MSI 00
Capabilities: [80] Power Management version 3
Capabilities: [88] Subsystem: Super Micro Computer Inc Atom processor C2000 PCIe Root Port 3
Capabilities: [90] MSI: Enable+ Count=1/1 Maskable+ 64bit-
Capabilities: [100] Advanced Error Reporting
Kernel driver in use: pcieport
Kernel modules: shpchp
00:0e.0 Host bridge: Intel Corporation Atom processor C2000 RAS (rev 02)
Subsystem: Super Micro Computer Inc Atom processor C2000 RAS
Flags: fast devsel
Capabilities: [40] Express Root Complex Integrated Endpoint, MSI 00
00:0f.0 IOMMU: Intel Corporation Atom processor C2000 RCEC (rev 02)
Subsystem: Super Micro Computer Inc Atom processor C2000 RCEC
Flags: bus master, fast devsel, latency 0, IRQ 11
Capabilities: [40] Express Root Complex Event Collector, MSI 00
Capabilities: [80] Power Management version 3
Capabilities: [90] MSI: Enable- Count=1/1 Maskable+ 64bit-
Capabilities: [100] Advanced Error Reporting
Capabilities: [150] Root Complex Event Collector <?>
00:13.0 System peripheral: Intel Corporation Atom processor C2000 SMBus 2.0 (rev 02)
Subsystem: Super Micro Computer Inc Atom processor C2000 SMBus 2.0
Flags: bus master, fast devsel, latency 0, IRQ 27
Memory at df1ab000 (64-bit, non-prefetchable) [size=1K]
Capabilities: [40] Express Root Complex Integrated Endpoint, MSI 00
Capabilities: [80] Power Management version 3
Capabilities: [8c] MSI: Enable+ Count=1/1 Maskable+ 64bit+
Capabilities: [100] Advanced Error Reporting
Kernel driver in use: ismt_smbus
Kernel modules: i2c_ismt
00:14.0 Ethernet controller: Intel Corporation Ethernet Connection I354 (rev 03)
Subsystem: Super Micro Computer Inc Ethernet Connection I354
Flags: bus master, fast devsel, latency 0, IRQ 20
Memory at df120000 (64-bit, non-prefetchable) [size=128K]
I/O ports at e060 [size=32]
Memory at df1a4000 (64-bit, non-prefetchable) [size=16K]
Capabilities: [40] Power Management version 3
Capabilities: [50] MSI: Enable- Count=1/1 Maskable+ 64bit+
Capabilities: [70] MSI-X: Enable+ Count=10 Masked-
Capabilities: [a0] Express Root Complex Integrated Endpoint, MSI 00
Capabilities: [100] Advanced Error Reporting
Capabilities: [140] Device Serial Number 0c-c4-7a-ff-ff-0e-c7-ee
Capabilities: [1a0] Transaction Processing Hints
Capabilities: [1d0] Access Control Services
Kernel driver in use: igb
Kernel modules: igb
00:14.1 Ethernet controller: Intel Corporation Ethernet Connection I354 (rev 03)
Subsystem: Super Micro Computer Inc Ethernet Connection I354
Flags: bus master, fast devsel, latency 0, IRQ 21
Memory at df100000 (64-bit, non-prefetchable) [size=128K]
I/O ports at e040 [size=32]
Memory at df1a0000 (64-bit, non-prefetchable) [size=16K]
Capabilities: [40] Power Management version 3
Capabilities: [50] MSI: Enable- Count=1/1 Maskable+ 64bit+
Capabilities: [70] MSI-X: Enable+ Count=10 Masked-
Capabilities: [a0] Express Root Complex Integrated Endpoint, MSI 00
Capabilities: [100] Advanced Error Reporting
Capabilities: [140] Device Serial Number 0c-c4-7a-ff-ff-0e-c7-ee
Capabilities: [1a0] Transaction Processing Hints
Capabilities: [1d0] Access Control Services
Kernel driver in use: igb
Kernel modules: igb
00:16.0 USB controller: Intel Corporation Atom processor C2000 USB Enhanced Host Controller (rev 02) (prog-if 20 [EHCI])
Subsystem: Super Micro Computer Inc Atom processor C2000 USB Enhanced Host Controller
Flags: bus master, medium devsel, latency 0, IRQ 23
Memory at df1aa000 (32-bit, non-prefetchable) [size=1K]
Capabilities: [50] Power Management version 3
Capabilities: [58] Debug port: BAR=1 offset=00a0
Capabilities: [98] PCI Advanced Features
Kernel driver in use: ehci-pci
Kernel modules: ehci_pci
00:18.0 SATA controller: Intel Corporation Atom processor C2000 AHCI SATA3 Controller (rev 02) (prog-if 01 [AHCI 1.0])
Subsystem: Super Micro Computer Inc Atom processor C2000 AHCI SATA3 Controller
Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 28
I/O ports at e0b0 [size=8]
I/O ports at e0a0 [size=4]
I/O ports at e090 [size=8]
I/O ports at e080 [size=4]
I/O ports at e020 [size=32]
Memory at df1a9000 (32-bit, non-prefetchable) [size=2K]
Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [70] Power Management version 3
Capabilities: [a8] SATA HBA v1.0
Kernel driver in use: ahci
Kernel modules: ahci
00:1f.0 ISA bridge: Intel Corporation Atom processor C2000 PCU (rev 02)
Subsystem: Super Micro Computer Inc Atom processor C2000 PCU
Flags: bus master, medium devsel, latency 0
Capabilities: [e0] Vendor Specific Information: Len=0c <?>
Kernel driver in use: lpc_ich
Kernel modules: lpc_ich
00:1f.3 SMBus: Intel Corporation Atom processor C2000 PCU SMBus (rev 02)
Subsystem: Super Micro Computer Inc Atom processor C2000 PCU SMBus
Flags: medium devsel, IRQ 18
Memory at df1a8000 (32-bit, non-prefetchable) [size=32]
I/O ports at e000 [size=32]
Kernel driver in use: i801_smbus
Kernel modules: i2c_i801
02:00.0 PCI bridge: ASPEED Technology, Inc. AST1150 PCI-to-PCI Bridge (rev 03) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=02, secondary=03, subordinate=03, sec-latency=32
I/O behind bridge: 0000d000-0000dfff
Memory behind bridge: de000000-df0fffff
Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [78] Power Management version 3
Capabilities: [80] Express PCI-Express to PCI/PCI-X Bridge, MSI 00
Capabilities: [a4] Subsystem: Super Micro Computer Inc AST1150 PCI-to-PCI Bridge
Capabilities: [100] Virtual Channel
Kernel modules: shpchp
03:00.0 VGA compatible controller: ASPEED Technology, Inc. ASPEED Graphics Family (rev 30) (prog-if 00 [VGA controller])
Subsystem: Super Micro Computer Inc ASPEED Graphics Family
Flags: bus master, medium devsel, latency 0, IRQ 17
Memory at de000000 (32-bit, non-prefetchable) [size=16M]
Memory at df000000 (32-bit, non-prefetchable) [size=128K]
I/O ports at d000 [size=128]
[virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
Capabilities: [40] Power Management version 3
Capabilities: [50] MSI: Enable- Count=1/4 Maskable- 64bit+
Kernel driver in use: ast
Kernel modules: ast
答案1
你搞错了：硬件网络接口不是定义在 中/etc/network/interfaces。它们被内核检测到，然后可用。如果您没有将它们放入 中/etc/network/interfaces，它们将保持未使用状态并处于“关闭”状态。
ifconfig默认情况下，将仅显示处于“启动”状态的接口。如果要查看所有接口，请使用ifconfig -a。然后您将看到eno2，它当前处于关闭状态。
要删除eno2，您需要从系统中物理删除它。
您的专用服务器配有双端口 NIC。这在 中很明显lspci。由于它是双端口 NIC，因此您无法移除第二个端口。
“Avoton”（C2000）系列的所有 Atom 处理器都至少有 2 个内置以太网 MAC。