Ok. Definitively a network problem. The first error means your machine does not resolve Domain Names (DNS). In linux the DNS is set automatically upon connection and the IP of the DNS servers are written in /etc/resolv.conf.

The second error means there is a problem with the network gateway. Is the machine the same from which you're connecting to LinuxQuestions (I mean: are you sure it is connected to internet)? Please, show us the output of and Feel free to mask out the actual IP of your machine by changing the IP with XXX.XXX.XXX.XXX (in respect of your privacy).

Sir the output of route -n is

[root@sagar Downloads]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
202.141.30.132 0.0.0.0 255.255.255.255 UH 0 0 0 eth0
172.16.0.0 0.0.0.0 255.255.0.0 U 1 0 0 eth0
0.0.0.0 202.141.30.132 0.0.0.0 UG 0 0 0 eth0

and the output of ifconfig -a is

[root@sagar Downloads]# ifconfig -a
eth0 Link encap:Ethernet HWaddr 00:01:6C:53:FA5
inet addr:172.16.57.33 Bcast:172.16.255.255 Mask:255.255.0.0
inet6 addr: fe80::201:6cff:fe53:fad5/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:23027 errors:0 dropped:0 overruns:0 frame:0
TX packets:3554 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:5310772 (5.0 MiB) TX bytes:873889 (853.4 KiB)
Interrupt:17

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:312 errors:0 dropped:0 overruns:0 frame:0
TX packets:312 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:25136 (24.5 KiB) TX bytes:25136 (24.5 KiB)

So, please help me.