How can I find the full hostname (FQDN) of the system I am running on?



How can I find the full hostname (FQDN) of the system I am running on?..

Answer / chaitanya

Some systems set the hostname to the FQDN and others set it to just the unqualified host name. I know the current BIND FAQ recommends the FQDN, but most Solaris systems, for example, tend to use only the unqualified host name.

Regardless, the way around this is to first get the host's name (perhaps an FQDN, perhaps unaualified). Most systems support the Posix way to do this using uname(), but older BSD systems only provide gethostname(). Call gethostbyname() to find your IP address. Then take the IP address and call gethostbyaddr(). The h_name member of the hostent{} should then be your FQDN.

Is This Answer Correct ?    1 Yes 0 No

Post New Answer

More Unix Socket Programming Interview Questions

What is af_inet in socket?

0 Answers  


What is socket address with example?

0 Answers  


What are Sockets?

1 Answers  


How do I get my server to find out the clients address / host- name?

1 Answers  


Why do I keep getting EINTR from the socket calls?

1 Answers  






How many sockets can a cpu have?

0 Answers  


How are unix domain sockets implemented?

0 Answers  


How can I listen on more than one port at a time?

1 Answers  


What is the difference between close() and shutdown()?

1 Answers  


What exactly does SO_REUSEADDR do?

1 Answers  


Why do not my sockets close?

1 Answers  


What is a socket file?

0 Answers  


Categories