How to verify Apache web server status - Parallels Plesk Panel for Linux/Unix.
The name of Apache 2 binary on Debian and SuSE OSes is “apache2,” not “httpd” as it is on Red Hat-based Linux distributions or FreeBSD.
# ps ax | grep httpd | grep -v grep
If not, try to start Apache from Plesk CP or via command line. If you get an error, check /var/log/httpd/error_log (/var/log/apache2/error_log on SuSE and Debian, /usr/local/psa/apache/logs/error_log on FreeBSD)
Make sure that Apache is listening on the both HTTP and HTTPS ports (80/443) on all needed IP addresses:
# netstat -l | grep http
tcp 0 0 *:http *:* LISTEN
tcp 0 0 *:https *:* LISTEN
Repository Structure Parallels Plesk Panel for Linux/Unix
The Parallels Plesk Panel for Linux/Unix repository located at http://autoinstall.plesk.com is structured as follows.
* products.inf3 - Parallels Installer configuration file which describes the Panel products
* plesk.inf3 - Parallels Installer configuration files which describe different versions of the Panel and additional components.
* pp-sitebuilder.inf3 - The configuration file which describes SiteBuilder - the required Panel component.
* billing.inf3 - The configuration file which describes Customer & Business Manager - the Panel component.
* [PRODUCT_NAME]_[product_version] - Several subdirectories named in accordance with the Panel versions.
Reference: http://parallels.com/