CHAPTER 8 How to Fix The Web: Obscure Back-End Techniques and Terminal Secrets
You can use the ping command to see if it is up and available. Type
ping 192.168.0.1.$ ping 192.168.0.1
PING 192.168.0.1 (192.168.0.1) 56(84) bytes of data.
64 bytes from 192.168.0.1: icmp_seq=1 ttl=64 time=1.31 ms
64 bytes from 192.168.0.1: icmp_seq=2 ttl=64 time=0.561 ms
64 bytes from 192.168.0.1: icmp_seq=3 ttl=64 time=12.6 msThe “64 bytes from 192.168.0.1” represents a successful reply. If you get
a reply, then your broadband router is reachable. If not, then check it again.
On Mac and Linux the replies will go on forever until you press Control + C.
On Windows, it will quit after the fourth ping.beYonD The RouTeR
To go beyond your router, you will need the traceroute command on
Mac and Linux, and tracert on Windows. This command traces a route
through the Internet, reporting each networking device (router) it comes
across. IP addresses are formed of four numbers from 0 to 255^10. Pick an IP
address out of a hat and try it:$ traceroute -q 1 -n 1.2.3.4
traceroute to 1.2.3.4 (1.2.3.4), 30 hops max, 60 byte packets
1 *
2 80.3.65.217 9.163 ms
3 213.105.159.157 11.158 ms
4 213.105.159.190 11.215 ms
...
13 72.14.236.149 98.484 ms
14 209.85.252.47 104.071 ms
15 *
16 *...10 There are newer long IPv6 (version 6) addresses which have 8 blocks of 4 hexidemcial digits separa-
ted by colons, but you are unlikely to come across these in 2013.