configuring jabber at Ubuntu

External Links:

https://help.ubuntu.com/community/SettingUpJabberServer 
http://svn.process-one.net/ejabberd/tags/ejabberd-2.0.5/doc/guide.html
http://en.wikipedia.org/wiki/Extensible_Messaging_and_Presence_Protocol

Configuring jabber on the ubuntu system

sudo apt-get install ejabberd

{hosts, ["localhost"]}. --> to --> {hosts, ["localhost","servername.com"]}.

{acl, admin, {user, "", "localhost"}}.   --> to --> {acl, admin, {user, "admin-name", "servername.com"}}.
sudo service ejabberd restart
sudo ejabberdctl register admin-name servername.com password
http://servername.com:5280/admin

NOTE
once you login to the portal of the jabber server you can create other user's from there.
example:
http://servername.com:5280/admin/server/servername.com/users/

How to add clients:
Later you can use any of the xmmp/jabber client and add the user:
username1@servername.com and give the password. [ NOTE: DNS or Host should be able to resolve the servername.com ]

FEW IMPORT PATH/FILES:
/etc/ejabberd/ejabberd.cfg
/etc/default/ejabberd
/usr/lib/ejabberd/
/usr/share/doc/ejabberd/examples

command:  sudo dpkg --listfiles ejabberd