/etc/ethers contains 48 bit Ethernet addresses and their corresponding
IP numbers, one line for each IP number:
Ethernet-addressIP-number
The two items are separated by any number of SPACE and/or TAB char
acters. A # at the beginning of a line starts a comment
which extends to the end of the line. The Ethernet-address is
written as
x : x : x : x : x : x , where x is a hexadecimal number between 0 and ff
which represents one byte of the address, which is in network byte
order (big-endian). The IP-number may be a hostname which
can be resolved by DNS or a dot separated number.
