Update user_dashboard.php (#4417)

core/user_settings/user_dashboard.php

@@ -1064,6 +1064,18 @@
 					}
 				}
 
+			//memory free
+				if (stristr(PHP_OS, 'Linux')) {
+					$result = trim(shell_exec('free -h | grep \'Mem:\' | cut -d\' \' -f25-30'));
+					if ($result != '') {
+						$hud[$n]['html'] .= "<tr class='tr_link_void'>\n";
+						$hud[$n]['html'] .= "<td valign='top' class='".$row_style[$c]." hud_text'>".$text['label-memory_free']."</td>\n";
+						$hud[$n]['html'] .= "<td valign='top' class='".$row_style[$c]." hud_text' style='text-align: right;'>".$result."</td>\n";
+						$hud[$n]['html'] .= "</tr>\n";
+						$c = ($c) ? 0 : 1;
+					}
+				}
+
 			//disk usage
 				if (stristr(PHP_OS, 'Linux')) {
 					//calculated above