Version
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root@server:~# cat /etc/debian_version
8.11Can't resolve host names
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root@server:~# ping www.google.com
ping: unknown host www.google.comifconfig -a
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root@server:/# ifconfig -a
docker0 Link encap:Ethernet HWaddr 02:42:cc:08:fa:30
inet addr:172.17.0.1 Bcase:172.17.255.255 Mask:255.255.0.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
eth0 Link encap:Ethernet HWaddr 48:5b:39:c1:ce54
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:45 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:15390 (15.0 KiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.255.0.0
inet6 addr: ::1/128 Scope:Host
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:14591 errors:0 dropped:0 overruns:0 frame:0
TX packets:14591 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:4115174 (3.0 MiB) TX bytes:4115174 (3.9 MiB)ping router IP (expected default gateway)
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root@server:/# ping 192.168.xxx.xxx
connect: Network is unreachableContents of /etc/hosts
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root@server:~# cat /etc/hosts
# This configuration file is auto-generated.
# WARNING: Do not edit this file, your changes will be lost.
127.0.0.1 localhost
127.0.1.1 server.local server
# The following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-localnet
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhostsContents of my /etc/network/interfaces file:
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root@server:~# cat /etc/network/interfaces
# The loopback network interface
auto lo
iface lo inet loopback
#eth0n network interface
auto eth0 allow-hotplug eth0
iface eth0 inet dhcp
iface eth0 inet6 manual
pre-down ip -6 addr flush dev $IFACE
Contents of /etc/nsswitch.conf
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root@server:/# cat /etc/nsswitch.conf
# /etc/nsswitch.conf
#
# Example configuration of GNU Name Service Switch functionality.
# If you have the glibc-doc-refence' 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 [NOTFOUND=return] dns mdns4
networks: files
protocols: db files
services: db files
ethers: db files
rpc: db files
netgroup: nis