You may sometimes encounter the following problem while starting apache server
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[root@epsilon root]# /etc/init.d/httpd start
Starting httpd: (98)Address already in use: make_sock: could not bind to address 0.0.0.0:443
no listening sockets available, shutting down
Unable to open logs
[FAILED]
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To fix this run the following commands
fuser -k -n tcp 443

gnusys.net has changed its webserver to the Russian legend nginx (pronounced engineX )
I have also added APC for caching the php bytecode ( APC is used by Yahoo Inc ,Wikipedia.org etc among others). I will post the configuration shortly over here…  What i liked more about nginx is its simple and clean configuration which i [...]

Imagine your domain has ROR ( Ruby On Rails ) installed and it connects on port 1200
eg :- http://gnusys.net:1200 and you want to change the way it appears on the address bar as simply http://gnusys.net. Normally Apache won’t allow this as it is configured to work on port 80 as you all know. But [...]

Semaphore, it is a lot like a locking mechanism. In any server there is an order of precedence in which tasks must be accomplished. The semaphore is used to maintain that precedence order; more to the point, the precedence order is maintained by the semaphores. A succeeding task may not start until it has received [...]

Scenario:- Add Application icon missing or grayed out
“Add New Application” icon can be missing if “Hide all greyed out buttons by default” is enabled on the Server -> Interface management page in Plesk CP.
“Add New Application” can be greyed out if some application is already installed in the domains’ DocumentRoot folder (httpdocs or httpsdocs). It [...]

Sometimes you get the following error when accessing DBWebadmin (phpMyadmin ) in plesk
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#1045 - Access denied for user ‘pma_tUuzljY3KmgS’@’localhost’ (using password: YES)
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pma_tUuzljY3KmgS may vary according to your system
To fix this
vi /usr/local/psa/admin/htdocs/domains/databases/phpMyAdmin/libraries/config.default.php
and change the values of controluser , controlpass , pmadb to null
thats it ;save the file and now everything should work fine
Ref: http://forum.swsoft.com/showthread.php?s=&postid=167179#post167179

You can use third party programs like qmail-remove http://www.linuxmagic.com/opensource/qmail/qmail-remove to accomplish queue management in plesk control panel managed qmail
The Plesk control panel itself provides a modified version od qmHandle ( http://qmhandle.sourceforge.net/ )along with it that can be used with ease to manage the queue
To see the statistics of the queue:
–
/usr/local/psa/admin/bin/mailqueuemng -s
Messages in local queue:  0
Messages [...]