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

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 [...]

Check your error_log
* The first place to look
* Increase the LogLevel if needed
* Make sure to turn it back down (but not off) in production
Check System Health
* vmstat, systat, iostat, mpstat, lockstat, etc…
* Check interrupt load
o NIC might be overloaded
* Are you swapping memory?
o A web server should never swap
* Check system logs
o /var/log/message, /var/log/syslog, [...]

A slight change in the setup and now i can see the user who is executing the scripts in my website
Before when apache intrepets a php script it calls fastcgi which inturn calls the php cgi binary.But still the php binary is executed as the calling user which in our case is the user [...]

Today gnusys.net had a little downtime as i was trying to change my apache-php interface into FastCGI.
The installation of php-cgi and mod_fcgid went pretty simple in my Debian Etch;so was the configuration
The tricky part was that the wordpress blog was giving Internal Server Error in the index page.
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[Thu May 22 04:15:41 2008] [notice] mod_fcgid: call [...]

As everyone knows Apache is the most widely used web server and it has got a 75-25 usage rate when compared to Microsoft IIS. IIS was widely used before Apache and some of the major security flaws made people to rely on Apache which is upfront in terms of Security , flexibility and Reliability. I [...]