How "hostname -i" works

rohithsharma · 01-25-2013, 12:47 AM

Hi guys,

I want to know how the "hostname -i" works.

In one of my machine, when I have /etc/hosts mapping for the ip.

When I execute "hostname -i", I get IP address.
i.e rohith:~#hostname -i
10.10.10.11
But, when there is duplicate entry in the /etc/hosts mapping
Example :
10.10.10.11 rohith
10.10.10.11 rohith

I get result for "hostname -i" 2 ip addresses.
i.e rohith:~#hostname -i
10.10.10.11 10.10.10.11

Can someone please help me to resolve this problem?

Regards
Rohith Sharma K S

pan64 · 01-25-2013, 12:58 AM

see man hostname: a host may have several ip addresses, hostname -i will print all of them. You need to fix it by removing the second entry or by parsing the result

rohithsharma · 01-25-2013, 02:05 AM

Hi pan,

Thank for your immidiate reply :-)

I would like to know that in some of the machine, eventhough I have duplicate entries "hostname -i" is giving single IP address.

I am facing this issue only in some machines and both the machine OS are same.