SQLSTATE[HY000] [2002] No such file or directory [duplicate]

Hi,

I have a problem with plugin installation in my 2.3.1 version.

After adding it into default /download folder, i am unable to install it via WEB GUI (i am getting blank page / plugin already installed).

In /var/log/httpd/error_log i am getting:

PHP Fatal error:  Uncaught PDOException: SQLSTATE[HY000] [2002] No such file or directory in /usr/share/ocsinventory-reports/ocsreports/plugins/main_sections/ms_plugins/functions_check.php:49\nStack trace:\n#0 /usr/share/ocsinventory-reports/ocsreports/plugins/main_sections/ms_plugins/functions_check.php(49): PDO->__construct('mysql:host=;dbn...', 'root', 'root')\n#1 /usr/share/ocsinventory-reports/ocsreports/plugins/main_sections/ms_plugins/ms_pluginsmanager.php(124): check(Array)\n#2 /usr/share/ocsinventory-reports/ocsreports/require/header.php(437): require('/usr/share/ocsi...')\n#3 /usr/share/ocsinventory-reports/ocsreports/index.php(44): require('/usr/share/ocsi...')\n#4 {main}\n  thrown in /usr/share/ocsinventory-reports/ocsreports/plugins/main_sections/ms_plugins/functions_check.php on line 49, referer: http://starsq.ddns.net:4433/ocsreports/index.php?function=pluginsmanager

I have gooled that the problem could be in:

I had the exact same problem. None of the above solutions worked for me. I solved the problem by changing the "host" in the /app/config/database.php file from "localhost" to "127.0.0.1".

http://stackoverflow.com/questions/20723803/pdoexception-sqlstatehy000-2002-no-such-file-or-directory

Any ideas where / how to change the value of PDO from localhost to 127.0.0.1?