Prueba con el comando PING desde la consola:
Cita: dandebian@dan:[~]$ ping -c 6 google.es
PING google.es (216.239.59.104) 56(84) bytes of data.
64 bytes from google.es (216.239.59.104): icmp_seq=1 ttl=237 time=112 ms
64 bytes from google.es (216.239.59.104): icmp_seq=2 ttl=237 time=114 ms
64 bytes from google.es (216.239.59.104): icmp_seq=3 ttl=237 time=114 ms
64 bytes from google.es (216.239.59.104): icmp_seq=4 ttl=237 time=111 ms
64 bytes from google.es (216.239.59.104): icmp_seq=5 ttl=237 time=113 ms
64 bytes from google.es (216.239.59.104): icmp_seq=6 ttl=237 time=114 ms
--- google.es ping statistics ---
6 packets transmitted, 6 received, 0% packet loss, time 5002ms
rtt min/avg/max/mdev = 111.977/113.410/114.544/1.027 ms
dandebian@dan:[~]$