ETHERS(5) Standards, Environments, and Macros ETHERS(5)


ethers - Ethernet address to hostname database or domain


The ethers file is a local source of information about the (48-bit)
Ethernet addresses of hosts on the Internet. The ethers file can be used
in conjunction with or instead of other ethers sources, including the NIS
maps ethers.byname and ethers.byaddr, or Ethernet address data stored on
an LDAP server. Programs use the ethers(3SOCKET) routines to access this

The ethers file has one line for each host on an Ethernet. The line has
the following format:

Ethernet-address official-host-name

Items are separated by any number of SPACE and/or TAB characters. A `#'
indicates the beginning of a comment extending to the end of line.

The standard form for Ethernet addresses is "x:x:x:x:x:x" where x is a
hexadecimal number between 0 and ff, representing one byte. The address
bytes are always in network order. Host names may contain any printable
character other than SPACE, TAB, NEWLINE, or comment character.




ethers(3SOCKET), hosts(5), nsswitch.conf(5)

February 25, 2017 ETHERS(5)