Linux - CentOS 5.2 questions

I'm new to Linux and have a few questions.

1)  Which download of MySQL is recommended for CentOS 5.2?

2)  After installing, the host name of the server was that of an old PC that use to be part of our system.  I didn't set it and don't know how it was generated.  Any ideas?

3)  I'm looking for documentation on how to join this server to an Active Directory.

4)  It looks like VNC is installed but while I can ping the server I can't VNC into it.  Is there something I need to do before that is possible?  Is there a better remote access software I should be looking at?
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si_shamilConnect With a Mentor Commented:
To install mysql type following commands as root:
   yum install mysql mysql-server
   chkconfig --levels 235 mysqld on
   service mysqld start

To change hostname edit the this file: /etc/sysconfig/network and enter the appropriate name using the HOSTNAME variable.
then reboot for changes to take effect

Here is a detailed how to for joining to domain as member server:

Installing & Configuring VNC server.
Assume you have CentOS installed with Gnome. If you want to remotely access the GUI to that machine, you can use vnc-server and a vnc client (like Chicken of the VNC). Here's how:

Make sure vnc-server is installed:
   sudo yum install vnc-server

Run vnc-server, for initially create configs and choose a password.:

 Now Edit the file ~/.vnc/xstartup so it runs a gnome session instead of crappy twm:

   # Uncomment the following two lines for normal desktop:
   # exec /etc/X11/xinit/xinitrc

   [ -x /etc/vnc/xstartup ] && exec /etc/vnc/xstartup
   [ -r $HOME/.Xresources ] && xrdb $HOME/.Xresources
   xsetroot -solid grey
   vncconfig -iconic &
   xterm -geometry 80x24+10+10 -ls -title "$VNCDESKTOP Desktop" &
   exec gnome-session &

Kill vnc server and restart it:
   killall Xvnc

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