please nginx in my server did start please follow me

root@s45-****:/home/arabico# nmap 45.****



PORT   STATE SERVICE

22/tcp open  ssh

5/tcp open  smtp

80/tcp open  http



Nmap done: 1 IP address (1 host up) scanned in 0.06 seconds

root@s45-****:/home/arabico# sudo service apache2 stop

 * Stopping web server apache2                                                      * 

root@s45-****:/home/arabico# nmap 45.****



Starting Nmap 6.40 ( http://nmap.org ) at 2015-06-05 19:33 MST



PORT   STATE SERVICE

22/tcp open  ssh

25/tcp open  smtp



Nmap done: 1 IP address (1 host up) scanned in 0.06 seconds

root@s45-***:/home/arabico# sudo service nginx restart

 * Restarting nginx nginx          

          [fail] 





root@s45-***:/home/arabico# nginx -t

nginx: the configuration file /etc/nginx/nginx.conf syntax is ok

nginx: [emerg] socket() [::]:80 failed (97: Address family not supported by protocol)

nginx: configuration file /etc/nginx/nginx.conf test failed



root@s45***:/home/arabico# sudo nginx

nginx: [emerg] socket() [::]:80 failed (97: Address family not supported by protocol)

how to let it start please