Answer / guest

If you give "ping hostname" the server will give the result
from /etc/hosts file & if you give "ping hostname.domainname"
then i will search through internet.

Answer / shareef

Dear Colleagues

/etc/nsswitch.conf decides on the services used for a
variety of name resolution requirements
the part of interreset for this question is :

hosts: files ----> this will only resolve hostnames
from the /etc/hosts file
but if you add 'dns' next to files ; then you activate the
name resolution service [otherwise called to DNS client] ;
that used to resolve names through hosts file to resolve
names [ this time through dns naming model] from the server
configured in /etc/resolve.conf

which may look something like this

myhost# cat /etc/resolv.conf
domain mydomain.internal
search mydomain.internal
options retry:1 timeout:1
nameserver 10.234.206.73
nameserver 10.10.98.38


this file direct the name resolution through the configured
nameserver ; and will search for a given hostname through
hosts file first then through DNS resolution by appending
the configured domain name

regards

Answer / rk

If your are pointing to the DNS server why you need to add
it in a /etc/hosts

if you are not able to ping through hostname just type "dns"
in /etc/nsswitch.conf file if you try to access through
hostname it read the nsswitch.conf file this file will
point to dns server.

Answer / mahesh

Both gives the same result.
this result would confirm the server is alive or not.

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