instant Messenger: Openfire, Spark & web chat (Fastpath)

-> Openfire
1 . lynx http://www.igniterealtime.org/downloads/download-landing.jsp?file=openfire/openfire-3.4.5-1.i386.rpm
2 . rpm -ivh openfire-3.4.5-1.i386.rpm
3 . /etc/rc.d/init.d/openfire status
4 . /etc/rc.d/init.d/openfire start
5. Make sure that the firewall is stopped.
6 . http://www.grmtech.com:9090/
7 . From the plugin tab in the web based admin control panel: installed Asterisk-IM Openfire

-> Spark
Download and install on client system.
http://www.igniterealtime.org/downloadServlet?filename=spark/spark_2_5_8.exe

-> web chat
Go to plugin tab in the web based admin control panel:
1.Click on 'Available Plugins'
2. Install the following plugin
a. Spark Fastpath Webchat
b. Fastpath Service
c. Monitoring Service (its is a optional)

How to make a linux server act as a gateway

1. turned on IP forwarding in sysctl.conf by setting the value to 1
2. gave the ip tables command for nat masquerade.
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
iptables -t nat -A POSTROUTING -o eth1 -j MASQUERADE
Checked that the commands took effect by:
iptables-save
and then made the entries from iptables-save inside the file /etc/sysconfig/iptables

Check and Rebuilding failed Linux software RAID

# cat /proc/mdstat
# mdadm -D /dev/md0
Detail : http://sitearticles.com/cms/show/43.html

ssh commands to log in without the password

ssh commands to log in without the password
# ssh-keygen -t rsa
* This will generate your id_rsa and id_rsa.pub in the .ssh directory in your home directory
* copy the id_rsa.pub to the .ssh directory of the remote host you want to logon to as authorized_keys2
* If you have more than one host from which you want to connect to the remote host, you need to add the local host's id_rsa.pub as one line in the authorized_keys2 file of the remote host command for the 1and1 servers is:
# scp .ssh/id_rsa.pub u35894953@217.160.226.69:./.ssh/authorized_keys2

:)