06-05-2009
[solved]Issue with /etc/hosts file under ubuntu
I think terminal outpu is better than long words so:
Quote:
bastien@bastien-laptop:~$ cat /etc/hosts
127.0.0.1 localhost
127.0.1.1 bastien-laptop
10.192.5.200 3560
10.192.5.11 4507
10.192.5.250 7603_bas
10.192.5.28 7603_haut
10.192.5.253 7609
10.192.5.245 7609_2
# The following lines are desirable for IPv6 capable hosts
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts
bastien@bastien-laptop:~$ ping 4507
connect: Invalid argument
bastien@bastien-laptop:~$ ping 10.192.5.11
PING 10.192.5.11 (10.192.5.11) 56(84) bytes of data.
64 bytes from 10.192.5.11: icmp_seq=1 ttl=255 time=1.71 ms
64 bytes from 10.192.5.11: icmp_seq=2 ttl=255 time=1.36 ms
^C
--- 10.192.5.11 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 1.368/1.540/1.713/0.176 ms
bastien@bastien-laptop:~$
I rebooted my laptop but no success... It's the same for all entry i added... Any ideas ?
PS: I'm under ubuntu 9.0.4
edit: hostnames can't start with a number, using c4507 for example works.
Last edited by nekkro-kvlt; 06-05-2009 at 08:14 AM..
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HOSTS(5) Linux Programmer's Manual HOSTS(5)
NAME
hosts - static table lookup for hostnames
SYNOPSIS
/etc/hosts
DESCRIPTION
This manual page describes the format of the /etc/hosts file. This file is a simple text file that associates IP addresses with hostnames,
one line per IP address. For each host a single line should be present with the following information:
IP_address canonical_hostname [aliases...]
Fields of the entry are separated by any number of blanks and/or tab characters. Text from a "#" character until the end of the line is a
comment, and is ignored. Host names may contain only alphanumeric characters, minus signs ("-"), and periods ("."). They must begin with
an alphabetic character and end with an alphanumeric character. Optional aliases provide for name changes, alternate spellings, shorter
hostnames, or generic hostnames (for example, localhost).
The Berkeley Internet Name Domain (BIND) Server implements the Internet name server for UNIX systems. It augments or replaces the
/etc/hosts file or hostname lookup, and frees a host from relying on /etc/hosts being up to date and complete.
In modern systems, even though the host table has been superseded by DNS, it is still widely used for:
bootstrapping
Most systems have a small host table containing the name and address information for important hosts on the local network. This is
useful when DNS is not running, for example during system bootup.
NIS Sites that use NIS use the host table as input to the NIS host database. Even though NIS can be used with DNS, most NIS sites still
use the host table with an entry for all local hosts as a backup.
isolated nodes
Very small sites that are isolated from the network use the host table instead of DNS. If the local information rarely changes, and
the network is not connected to the Internet, DNS offers little advantage.
FILES
/etc/hosts
NOTES
Modifications to this file normally take effect immediately, except in cases where the file is cached by applications.
Historical notes
RFC 952 gave the original format for the host table, though it has since changed.
Before the advent of DNS, the host table was the only way of resolving hostnames on the fledgling Internet. Indeed, this file could be
created from the official host data base maintained at the Network Information Control Center (NIC), though local changes were often
required to bring it up to date regarding unofficial aliases and/or unknown hosts. The NIC no longer maintains the hosts.txt files, though
looking around at the time of writing (circa 2000), there are historical hosts.txt files on the WWW. I just found three, from 92, 94, and
95.
EXAMPLE
# The following lines are desirable for IPv4 capable hosts
127.0.0.1 localhost
# 127.0.1.1 is often used for the FQDN of the machine
127.0.1.1 thishost.mydomain.org thishost
192.168.1.10 foo.mydomain.org foo
192.168.1.13 bar.mydomain.org bar
146.82.138.7 master.debian.org master
209.237.226.90 www.opensource.org
# The following lines are desirable for IPv6 capable hosts
::1 localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
SEE ALSO
hostname(1), resolver(3), host.conf(5), resolv.conf(5), resolver(5), hostname(7), named(8)
Internet RFC 952
COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the
latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.
Linux 2017-09-15 HOSTS(5)