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Pourquoi le DNS ne résoud-il pas?

Je ne peux pas utiliser git clone ni même apt-get install parce que l'erreur "Impossible de résoudre l'hôte". Ils travaillaient auparavant, mais je ne sais pas du tout ce qui a brisé la résolution DNS. Je ne trouve aucune information sur ce qui se passe.

Ping:

ping google.com
ping: unknown Host google.com

Telnet:

telnet google.com
telnet: could not resolve google.com/telnet: Name or service not known

NSLookup:

nslookup google.com
Server:         8.8.8.8
Address:        8.8.8.8#53

Non-authoritative answer:
Name:   google.com
Address: 74.125.239.40
Name:   google.com
Address: 74.125.239.46
Name:   google.com
Address: 74.125.239.36
Name:   google.com
Address: 74.125.239.39
Name:   google.com
Address: 74.125.239.33
Name:   google.com
Address: 74.125.239.41
Name:   google.com
Address: 74.125.239.38
Name:   google.com
Address: 74.125.239.32
Name:   google.com
Address: 74.125.239.35
Name:   google.com
Address: 74.125.239.34
Name:   google.com
Address: 74.125.239.37

Hôte:

Host google.com
google.com has address 74.125.239.38
google.com has address 74.125.239.36
google.com has address 74.125.239.39
google.com has address 74.125.239.35
google.com has address 74.125.239.32
google.com has address 74.125.239.33
google.com has address 74.125.239.40
google.com has address 74.125.239.41
google.com has address 74.125.239.34
google.com has address 74.125.239.46
google.com has address 74.125.239.37
google.com has IPv6 address 2607:f8b0:4010:801::1009
google.com mail is handled by 50 alt4.aspmx.l.google.com
google.com mail is handled by 10 aspmx.l.google.com
google.com mail is handled by 20 alt1.l.google.com
google.com mail is handled by 40 alt3.l.google.com
google.com mail is handled by 30 alt2.l.google.com

/etc/nsswitch.conf:

# /etc/nsswitch.conf
#
# Example configuration of GNU Name Service Switch functionality.
# If you have the `glibc-doc-reference' and `info' packages installed, try:
# `info libc "Name Service Switch"' for information about this file.

passwd:         compat
group:          compat
shadow:         compat

hosts:          files mdns4_minimal dns wins [NOTFOUND=return] mdns4
networks:       files

protocols:      db files
services:       db files
ethers:         db files
rpc:            db files

netgroup:       nis

/etc/resolv.conf

# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
#     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 2001:4860:4860::8844
nameserver 2001:4860:4860::8888
nameserver 8.8.8.8

Serveur: Ubuntu 14.04 fiable, Nginx, HHVM FastCGI

route -n

Kernel IP routing table
Destination     Gateway        Genmask        Flags Metric Ref Use Iface
0.0.0.0         162.243.147.1  0.0.0.0        UG    0      0     0 eth0
162.243.147.0   0.0.0.0        255.255.255.0  U     0      0     0 eth0

/ etc/hosts:

127.0.1.1 my-domain.tld my-domain.tld
127.0.0.1 localhost

::1 ip6-localhost 1p6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts
14.04networkingserverdnsnginx
3
Confused One

Quelque chose n'allait pas avec ma configuration IPv6. J'ai donc supprimé la section IPv6 de mon fichier /etc/hosts, qui fonctionnait parfaitement.

Plus d'informations peuvent être trouvées ici: https://unix.stackexchange.com/questions/232434/why-Host-and-nslookup-on-ubuntu-resolve-hostnames-while-ping-and-telnet =

0
Confused One