"Unable to create directory 'temporary://update-extraction ..."
Public servers, paid or free, are useful to easily test applications like Drupal but unexpected problems, like the one mentioned above, can happen when installing Drupal modules, because of directory creation permissions. Directory permissions can be a problem in several circumstances and specially on public web sites where you may not have a convenient full acces to change server parameters.
1) To workaround: Using ftp.
Is not as practical as using the Drupal interface but you can always install a module directly on the server using ftp to drop the module to:
/public_html/tirestecnica/sites/all/modules
and then activate it on Drupal administration.
2) To solve the problem: change the temporary (tmp) location
On Drupal interface go to Home >> Administration >> Configuration >> File system
and there instead of "/tmp" use "./tmp"
That is it! Now drupal will install modules from the interface.
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