检查网络是否正常使用

[root@localhost ~]# more /etc/resolv.conf

; generated by /sbin/dhclient-script

search localdomain

nameserver 192.168.255.2

[root@localhost ~]# ping 192.168.255.2

connect: Network is unreachable

[root@localhost ~]# ifconfig

eth0     
Link encap:Ethernet  HWaddr
00:0C:29:7A:63:F3 

         
inet6 addr: fe80::20c:29ff:fe7a:63f3/64 Scope:Link

         
UP BROADCAST RUNNING MULTICAST 
MTU:1500  Metric:1

         
RX packets:0 errors:0 dropped:0 overruns:0 frame:0

         
TX packets:33 errors:0 dropped:0 overruns:0 carrier:0

         
collisions:0 txqueuelen:1000

         
RX bytes:0 (0.0 b)  TX bytes:7069 (6.9 KiB)

         
Interrupt:67 Base address:0x2024

lo       
Link encap:Local Loopback 

         
inet addr:127.0.0.1  Mask:255.0.0.0

         
inet6 addr: ::1/128 Scope:Host

         
UP LOOPBACK RUNNING  MTU:16436 
Metric:1

         
RX packets:2723 errors:0 dropped:0 overruns:0 frame:0

         
TX packets:2723 errors:0 dropped:0 overruns:0 carrier:0

         
collisions:0 txqueuelen:0

         
RX bytes:3968644 (3.7 MiB)  TX bytes:3968644 (3.7
MiB)