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ubuntu 伺服器 12.04.01 沒有互聯網

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ubuntu 伺服器 12.04.01 沒有互聯網

沒有安裝 GUI，以下是有關我的伺服器的有用資訊：

$ cat /etc/network/interfaces
# The loopback network interface. I disabled this one.
#auto lo 
#iface lo inet loopback 

# The primary network interface 
auto eth0
iface eth0 inet static
address 192.168.4.20   
netmask 255.255.255.0
gateway 192.168.4.1
broadcast 192.168.4.255

$ cat /etc/resolv.conf
nameserver 8.8.8.8
nameserver 4.2.2.2

$ route -n
Kernel IP routing table
Destination          Gateway          Genmask          Flags     Metric     Ref        Use        Iface
0.0.0.0              192.168.4.1     0.0.0.0             UG         0           0           0              eth0
192.168.4.0          0.0.0.0           255.255.255.0      U           0           0           0               eth0

$ ifconfig -a
eth0   Link encamp:Ethernet HWaddr 04:06:ff:aa22:33
        inet addr:192.168.4.20 Bcast:192.168.4.255 Mask:255.255.255.0
        UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
        RX packets:2 errors:0 dropped:0 overruns:0 frame:0
        TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
        collisions:0 txqueueln:1000
        RX Bytes:684 (684.0 B) TX bytes:600 (600.0 B)]

lo     Link encamp:Local Loopback
        inet addr:127.0.0.1 Mask:255.0.0.0
        UP LOOBACK RUNNING MTU:65536 Metric:1
        RX packets:48 errors:0 dropped:0 overruns:0 frame:0
        TX packets:48 errors:0 dropped:0 overruns:0 carrier:0
        collisions:0 txqueueln:0
        RX Bytes:4336 (4.3 KB) TX bytes:4336 (4.3 KB)

我已竭盡全力，但無法 ping 通 Google 的 DNS 或任何 URL。

答案1

首先，環回介面是必需的，不能刪除。我建議你將/etc/network/interfaces文件修改為：

auto lo 
iface lo inet loopback 

# The primary network interface 
auto eth0
iface eth0 inet static
address 192.168.4.20   
netmask 255.255.255.0
gateway 192.168.4.1
dns-nameservers 8.8.8.8 4.2.2.2

讓系統重新讀取並使用修改後的檔案：

sudo ifdown -a && sudo ifup -a

測試：

ping -c3 www.ubuntu.com

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