Ipadress:        192.168.1.3
Subnet mask:     255.255.255.0
Default gateway: 192.168.1.1

eth0      Link encap:Ethernet  HWaddr 00:1a:4d:49:69:70
          inet addr:192.168.1.2  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::21a:4dff:fe49:6970/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:48034 errors:0 dropped:0 overruns:0 frame:0
          TX packets:33635 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:47830516 (47.8 MB)  TX bytes:4089356 (4.0 MB)

sudo tcpdump -i eth0 icmp and icmp[icmptype]=icmp-echo
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 262144 bytes
13:50:10.499018 IP Windows7-PC > Ubuntu-PC: ICMP echo request, id 1, seq 25, length 40
13:50:15.198242 IP Windows7-PC > Ubuntu-PC: ICMP echo request, id 1, seq 26, length 40
13:50:20.198230 IP Windows7-PC > Ubuntu-PC: ICMP echo request, id 1, seq 27, length 40
13:50:25.200143 IP Windows7-PC > Ubuntu-PC: ICMP echo request, id 1, seq 28, length 40

PING 192.168.1.3 (192.168.1.3) 56(84) bytes of data.
64 bytes from 192.168.1.3: icmp_seq=1 ttl=128 time=6.32 ms
64 bytes from 192.168.1.3: icmp_seq=2 ttl=128 time=0.731 ms
64 bytes from 192.168.1.3: icmp_seq=3 ttl=128 time=1.40 ms
64 bytes from 192.168.1.3: icmp_seq=4 ttl=128 time=0.757 ms

ping 192.168.1.2
Request timed out.
Request timed out.
Request timed out.
Request timed out.