Every website has a domain name that uniquely identifies it over the internet; similarly, a computer has a hostname that uniquely identifies it over a network.
Your computer's hostname is stored in the file /etc/hostname:
root@ubuntu-linux:~# cat /etc/hostname
ubuntu-linux
You can use hostnames to reach other computers in the same network (subnet). For example, I have another computer with the hostname backdoor that is currently running, and I can ping it:
root@ubuntu-linux:~# ping backdoor
PING backdoor (172.16.1.67) 56(84) bytes of data.
64 bytes from 172.16.1.67 (172.16.1.67): icmp_seq=1 ttl=64 time=3.27 ms
64 bytes from 172.16.1.67 (172.16.1.67): icmp_seq=2 ttl=64 time=29.3 ms
64 bytes from 172.16.1.67 (172.16.1.67): icmp_seq=3 ttl=64 time=51.4 ms
^C
--- backdoor ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 20ms
rtt min/avg/max/mdev = 3.272/27.992/51.378/19.662 ms
Notice that backdoor is on the same network (subnet) and has an IP...
