CentOS 连接到互联网

2024-6-12 • tag-icon

centos

我安装了 CentOS，但它没有自动连接到互联网。这是正常现象吗？我有以太网宽带路由器 DI-604 和带 EMTA 的 WebStar DPX2203 系列电缆调制解调器。我应该怎么做才能连接到互联网？

更新：

一位表弟告诉我，我的以太网适配器或网络板将取决于我的主板。我的计算机升级文档说主板是 GBabyte 板载视频。我听说 GBabyte 的网络适配器是 GBabit 或 Realtek。

在CentOS中，系统->管理->网络->新建->以太网，首先，只列出了“其他网络板”，因此我选择它并单击下一步，然后没有GBabit，但是有Realtek，因此我选择了Realtek。

我听说 Net Virtua 选择 dhcp 时，第一个回答者要求我告诉第一个回答者的事情是自动配置的。

因此我尝试使用 Realtek dhcp，但eth0没有找到。

参见星号：

我们当时没有升级，主板是华硕的。/sbin/lspci -v显示以太网控制器Atheros L2，子系统是华硕。

ifconfig 输出：

lo    Link encap:Loopback Local  
      inet end.: 127.0.0.1  Masc:255.0.0.0
      endereço inet6: ::1/128 Escopo:Máquina
      UP LOOPBACKRUNNING  MTU:16436  Métrica:1
      RX packets:2509 errors:0 dropped:0 overruns:0 frame:0
      TX packets:2509 errors:0 dropped:0 overruns:0 carrier:0
      colisões:0 txqueuelen:0 
      RX bytes:2650372 (2.5 MiB)  TX bytes:2650372 (2.5 MiB)

virbr0    Link encap:Ethernet  Endereço de HW 00:00:00:00:00:00  
      inet end.: 192.168.122.1  Bcast:192.168.122.255  Masc:255.255.255.0
      endereço inet6: fe80::200:Firefox:fe00:0/64 Escopo:Link
      UP BROADCASTRUNNING MULTICAST  MTU:1500  Métrica:1
      RX packets:0 errors:0 dropped:0 overruns:0 frame:0
      TX packets:43 errors:0 dropped:0 overruns:0 carrier:0
      colisões:0 txqueuelen:0 
      RX bytes:0 (0.0 b)  TX bytes:7306 (7.1 KiB)

xenbr0    Link encap:Ethernet  Endereço de HW 00:00:00:00:00:00  
      UP BROADCASTRUNNING NOARP  MTU:1500  Métrica:1
      RX packets:0 errors:0 dropped:0 overruns:0 frame:0
      TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
      colisões:0 txqueuelen:0 
      RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

dhclient 输出：

bash: /sbin/dhclien: Arquivo ou diretório não encontrado
[root@localhost deltrem]# /sbin/dhclient
Internet Systems Consortium DHCP Client V3.0.5-RedHat
Copyright 2004-2006 Internet Systems Consortium.
All rights reserved.
For info, please visit http://www.isc.org/sw/dhcp/

/sbin/dhclient-script: configuration for xenbr0 not found. Continuing with defaults.
/etc/sysconfig/network-scripts/network-functions: line 78: xenbr0: Arquivo ou diretório não encontrado
/sbin/dhclient-script: configuration for veth3 not found. Continuing with defaults.
/etc/sysconfig/network-scripts/network-functions: line 78: veth3: Arquivo ou diretório não encontrado
/sbin/dhclient-script: configuration for vif0.3 not found. Continuing with defaults.
/etc/sysconfig/network-scripts/network-functions: line 78: vif0.3: Arquivo ou diretório não encontrado
/sbin/dhclient-script: configuration for veth2 not found. Continuing with defaults.
/etc/sysconfig/network-scripts/network-functions: line 78: veth2: Arquivo ou diretório não encontrado
/sbin/dhclient-script: configuration for vif0.2 not found. Continuing with defaults.
/etc/sysconfig/network-scripts/network-functions: line 78: vif0.2: Arquivo ou diretório não encontrado
/sbin/dhclient-script: configuration for veth1 not found. Continuing with defaults.
/etc/sysconfig/network-scripts/network-functions: line 78: veth1: Arquivo ou diretório não encontrado
/sbin/dhclient-script: configuration for vif0.1 not found. Continuing with defaults.
/etc/sysconfig/network-scripts/network-functions: line 78: vif0.1: Arquivo ou diretório não encontrado
/sbin/dhclient-script: configuration for veth0 not found. Continuing with defaults.
/etc/sysconfig/network-scripts/network-functions: line 78: veth0: Arquivo ou diretório não encontrado
/sbin/dhclient-script: configuration for vif0.0 not found. Continuing with defaults.
/etc/sysconfig/network-scripts/network-functions: line 78: vif0.0: Arquivo ou diretório não encontrado
/sbin/dhclient-script: configuration for virbr0 not found. Continuing with defaults.
/etc/sysconfig/network-scripts/network-functions: line 78: virbr0: Arquivo ou diretório não encontrado
Listening on LPF/xenbr0/00:00:00:00:00:00
Sending on   LPF/xenbr0/00:00:00:00:00:00
Listening on LPF/veth3/00:00:00:00:00:00
Sending on   LPF/veth3/00:00:00:00:00:00
Listening on LPF/vif0.3/fe:Firefox:Firefox:Firefox:Firefox:Firefox
Sending on   LPF/vif0.3/fe:Firefox:Firefox:Firefox:Firefox:Firefox
Listening on LPF/veth2/00:00:00:00:00:00
Sending on   LPF/veth2/00:00:00:00:00:00
Listening on LPF/vif0.2/fe:Firefox:Firefox:Firefox:Firefox:Firefox
Sending on   LPF/vif0.2/fe:Firefox:Firefox:Firefox:Firefox:Firefox
Listening on LPF/veth1/00:00:00:00:00:00
Sending on   LPF/veth1/00:00:00:00:00:00
Listening on LPF/vif0.1/fe:Firefox:Firefox:Firefox:Firefox:Firefox
Sending on   LPF/vif0.1/fe:Firefox:Firefox:Firefox:Firefox:Firefox
Listening on LPF/veth0/00:00:00:00:00:00
Sending on   LPF/veth0/00:00:00:00:00:00
Listening on LPF/vif0.0/fe:Firefox:Firefox:Firefox:Firefox:Firefox
Sending on   LPF/vif0.0/fe:Firefox:Firefox:Firefox:Firefox:Firefox
Listening on LPF/virbr0/00:00:00:00:00:00
Sending on   LPF/virbr0/00:00:00:00:00:00
Sending on   Socket/fallback
DHCPDISCOVER on xenbr0 to 255.255.255.255 port 67 interval 5
DHCPDISCOVER on veth3 to 255.255.255.255 port 67 interval 8
DHCPDISCOVER on vif0.3 to 255.255.255.255 port 67 interval 8
DHCPDISCOVER on veth2 to 255.255.255.255 port 67 interval 7
DHCPDISCOVER on vif0.2 to 255.255.255.255 port 67 interval 8
DHCPDISCOVER on veth1 to 255.255.255.255 port 67 interval 5
DHCPDISCOVER on vif0.1 to 255.255.255.255 port 67 interval 6
DHCPDISCOVER on veth0 to 255.255.255.255 port 67 interval 3
DHCPDISCOVER on vif0.0 to 255.255.255.255 port 67 interval 6
DHCPDISCOVER on virbr0 to 255.255.255.255 port 67 interval 7
DHCPDISCOVER on veth0 to 255.255.255.255 port 67 interval 6
DHCPDISCOVER on xenbr0 to 255.255.255.255 port 67 interval 13
DHCPDISCOVER on veth1 to 255.255.255.255 port 67 interval 8
DHCPDISCOVER on vif0.1 to 255.255.255.255 port 67 interval 12
DHCPDISCOVER on vif0.0 to 255.255.255.255 port 67 interval 11
DHCPDISCOVER on veth2 to 255.255.255.255 port 67 interval 7
DHCPDISCOVER on virbr0 to 255.255.255.255 port 67 interval 8
DHCPDISCOVER on veth3 to 255.255.255.255 port 67 interval 20
DHCPDISCOVER on vif0.3 to 255.255.255.255 port 67 interval 15
DHCPDISCOVER on vif0.2 to 255.255.255.255 port 67 interval 14
DHCPDISCOVER on veth0 to 255.255.255.255 port 67 interval 11
DHCPDISCOVER on veth1 to 255.255.255.255 port 67 interval 21
DHCPDISCOVER on veth2 to 255.255.255.255 port 67 interval 11
DHCPDISCOVER on virbr0 to 255.255.255.255 port 67 interval 16
DHCPDISCOVER on vif0.0 to 255.255.255.255 port 67 interval 14
DHCPDISCOVER on xenbr0 to 255.255.255.255 port 67 interval 17
DHCPDISCOVER on vif0.1 to 255.255.255.255 port 67 interval 21
DHCPDISCOVER on veth0 to 255.255.255.255 port 67 interval 21
DHCPDISCOVER on vif0.2 to 255.255.255.255 port 67 interval 14
DHCPDISCOVER on vif0.3 to 255.255.255.255 port 67 interval 12
DHCPDISCOVER on veth2 to 255.255.255.255 port 67 interval 19
DHCPDISCOVER on veth3 to 255.255.255.255 port 67 interval 15
DHCPDISCOVER on virbr0 to 255.255.255.255 port 67 interval 13
DHCPDISCOVER on vif0.0 to 255.255.255.255 port 67 interval 14
DHCPDISCOVER on veth1 to 255.255.255.255 port 67 interval 13
DHCPDISCOVER on xenbr0 to 255.255.255.255 port 67 interval 8
DHCPDISCOVER on vif0.3 to 255.255.255.255 port 67 interval 16
DHCPDISCOVER on vif0.2 to 255.255.255.255 port 67 interval 9
DHCPDISCOVER on vif0.1 to 255.255.255.255 port 67 interval 20
DHCPDISCOVER on veth0 to 255.255.255.255 port 67 interval 11
DHCPDISCOVER on veth3 to 255.255.255.255 port 67 interval 10
DHCPDISCOVER on xenbr0 to 255.255.255.255 port 67 interval 13
DHCPDISCOVER on veth2 to 255.255.255.255 port 67 interval 17
DHCPDISCOVER on virbr0 to 255.255.255.255 port 67 interval 17
DHCPDISCOVER on vif0.0 to 255.255.255.255 port 67 interval 16
DHCPDISCOVER on vif0.2 to 255.255.255.255 port 67 interval 14
DHCPDISCOVER on veth1 to 255.255.255.255 port 67 interval 14
DHCPDISCOVER on vif0.3 to 255.255.255.255 port 67 interval 10
DHCPDISCOVER on veth0 to 255.255.255.255 port 67 interval 9
DHCPDISCOVER on veth3 to 255.255.255.255 port 67 interval 8
DHCPDISCOVER on xenbr0 to 255.255.255.255 port 67 interval 5
DHCPDISCOVER on vif0.1 to 255.255.255.255 port 67 interval 2
DHCPDISCOVER on vif0.2 to 255.255.255.255 port 67 interval 2
No DHCPOFFERS received.
No working leases in persistent database - sleeping.
/sbin/dhclient-script: configuration for veth2 not found. Continuing with defaults.
/etc/sysconfig/network-scripts/network-functions: line 78: veth2: Arquivo ou diretório não encontrado

更新：

安装 Atheros L2。make install 说：

make -C /lib/modules/2.6.18-194.el5xen/build SUBDIRS=/home/deltrem/l2/src modules
make[1]: Entrando no diretório `/usr/src/kernels/2.6.18-194.el5-xen-i686'
  CC [M]  /home/deltrem/l2/src/at_main.o
In file included from /home/deltrem/l2/src/at.h:30,
                 from /home/deltrem/l2/src/at_main.c:28:
/home/deltrem/l2/src/kcompat.h:1084: error: redefinition of typedef ‘irq_handler_t’
include/Linux/interrupt.h:67: error: previous declaration of ‘irq_handler_t’ was here
make[2]: ** [/home/deltrem/l2/src/at_main.o] Erro 1
make[1]: ** [_module_/home/deltrem/l2/src] Erro 2
make[1]: Saindo do diretório `/usr/src/kernels/2.6.18-194.el5-xen-i686'
make: ** [default] Erro 2

这里也看一下：

http://www.linuxquestions.org/questions/Linux-networking-3/unable-to-activate-eth0-attansic-l2-on-centos-5-1-a-619969/

答案1

当您尝试连接时会发生什么？

您能连接或 ping 路由器吗？

逻辑 IP 配置是什么（CentOS 盒的 IP 地址、网络掩码、广播地址、路由；路由器的类似信息）？

那么物理连接呢？哪些电缆连接到哪些端口，硬件配置是什么？（例如，交叉电缆还是直通电缆？无论使用哪种电缆，将 10BaseT 半双工卡连接到 GigE 专用端口都无法工作。）

答案2

检查这两个命令：

ifconfig eth0 192.168.122.10 netmask 255.255.255.0 broadcast 192.168.122.255 up  
route add default gw 192.168.122.1

答案1

答案2

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