ow can I find all the file descriptors used by a process such as httpd (Apache web server) or mysqld (MySQL Database server)?

You can use /proc file system or the lsof command to find all the file descriptors used by a process.
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1.0 Introduction

In this current changing world of unified communication, organizations and support teams require some form of communication to improve efficiency and possibly customer satisfaction. In this document, we will look at how to setup an Instant Messaging server on CentOS 5.6 using a free and open source XMPP based IM server. To continue we can say the following about XMPP:

Extensible Messaging and Presence Protocol (XMPP) is an open-standard communications protocol for message-oriented middleware based on XML (Extensible Markup Language).[1] The protocol was originally named Jabber,[2] and was developed by the Jabber open-source community in 1999 for, originally, near-real-time, extensible instant messaging (IM), presence information, and contact list maintenance. Designed to be extensible, the protocol today also finds application in VoIP and file transfer signaling.
Source: http://en.wikipedia.org/wiki/Extensible_Messaging_and_Presence_Protocol
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root@xxxxxx:~# sysctl -p /etc/sysctl.conf
got an error:

error: “net.bridge.bridge-nf-call-iptables” is an unknown key
error: “net.bridge.bridge-nf-call-arptables” is an unknown key

Fix:

sudo modprobe bridge

Suhosin for a domain can be disabled by 2 methods.

1) Using php.ini

2) Using .htaccess.

Following are the steps in order to
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To sort this just run the folowing command to map the databases:

[root@server ~]# /usr/local/cpanel/bin/setupdbmap
Once done you should be able to view the DB’s in the cPanel.