ethers

The ethers map is the abbreviated name for the ethers.by name map. The derived maps are ethers.byname and ethers.byaddr. In most cases, the NIS map is created from the file /etc/ethers file. A typical line looks like this:

ethernet_address host_name

For example:

52:ef:75:72:4e:c8 rhel9
31:ee:c5:72:4e:18 finance

For the ethers.byname map, entries are defined like this:

• Key is the host name: rhel9
• Value is the ethernet address for the host name: 52:ef:75:72:4e:c8

For the ethers.byaddr map, entries are defined like this:

• Key is an address: 52:ef:75:72:4e:c8
• Value is the host name: rhel9

If you create an ethers map in Active Directory, you must include the key as part of the value. For example:

• Key: rhel9
• Value: 52:ef:75:72:4e:c8 rhel9
• Comment: The host name for 52:ef:75:72:4e:c8 is rhel9