1# See https://tools.ietf.org/html/rfc5952, https://tools.ietf.org/html/rfc4007. 2 3# internet address and host name 4::1 localhost # inline comment separated by tab 5fe80:0000:0000:0000:0000:0000:0000:0001 localhost # inline comment separated by space 6 7# internet address with zone identifier and host name 8fe80:0000:0000:0000:0000:0000:0000:0002%lo0 localhost 9 10# internet address, host name and aliases 11fe80::3%lo0 localhost localhost.localdomain 12