SOLVED: can't install plugins via composer

[harvey186]

Hi,
next issue with plugin install. When trying installing plugisn via composer.json I get this message:

PEAR repository from http://pear.php.net could not be loaded. Your configuration does not allow connection to http://http://pear.php.net. See https://getcomposer.org/doc/06-config.md#secure-http for details.
  [Composer\Downloader\TransportException]                                                                                             
  The "https://plugins.roundcube.net/packages.json" file could not be downloaded: php_network_getaddresses: getaddrinfo failed: Name   
  or service not known                                                                                                                 
  failed to open stream: php_network_getaddresses: getaddrinfo failed: Name or service not known     

I don't know why cubietruck with Linaro 14.04 can't resolve the host names ??   

Please help.

EDIT: I have found the issue. In /etc/resolve.conf where added wrong "old" nameserver. After I have changed them to newest free DNS servers everything works