DNS: ping unknown host Solution

[Root @ localhost ~] # Ping www.baidu.com

Ping: unknown host

This is because the DNS server is not configured properly. If the network is correct, perform the following steps:

1) vi/etc/resolv. conf

Add

Nameserver 192.168.59.2 gateway address of the Local Machine (vro address)

Search localdomain # search parameter specifies the domain name search order

2) set the Gateway

Vi/etc/sysconf/network-scripts/ifcfg-eth0

Add

GATEWAY = 192.168.59.2

Or

Set using commands

Route add default gw 192.168.59.2

Then restart the network service:

Service network restart

3) make sure DNS resolution is available

[Root @ localhost Desktop] # grep hosts/etc/nsswitch. conf

Output

Hosts: files dns

This file/etc/nsswith. conf is an extended name server switch developed by SUN. It is used to set the order in which files are read. If you want to read the/etc/hosts file first, you must first find the DNS server.

Hosts: files dns specifies to first find the/etc/hosts file. If the file fails, go to the DNS server to find the host information corresponding to the domain name.

4) test DNS

Ping www.centoscn.com