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  1. or download this
    $ ping localhost
PING localhost (127.0.0.1) 56(84) bytes of data.
...
2 packets transmitted, 2 received, 0% packet loss, time 999ms
rtt min/avg/max/mdev = 0.038/0.045/0.053/0.010 ms
  2. or download this
    # /etc/hosts
127.0.0.1       localhost
192.168.254.74 lapcat