I want to install Web Application which include Web Hosting Control Panel. Which Linux system is the best OS for Web Application? (Fedora, Ubuntu, etc)

This is personal preference, but definitely not Fedora as the release cycle is something like every 6 months.
CentOS is a good bet. Uses rebranded version of RHEL source code and releases cycles are fewer.

As I know, Enterprise Linux is not free. It is not a choice. So your recommend is CentOS. Have you ever install a Web Server on CentOS? I have a few urgent question. Could you please give me your messenger id? This is urgent. I hope you can help me.

If you want to host a LAMP server that is going to get live on the net better option for OS would be something with longer life cycle. It seems you are not going to pay for enterprise support. So it is useless to suggest RHEL5 but you can put CentOS5 which is RHEL with logos removed and no enterprise support. But a community is always there to help you. Also it is binary compatible with RHEL. And its life cycle is around 7 years which is enough.
Fedora and Ubuntu are good desktop OSes. But the life cycle is too short for server purposes.
You can otherwise go for Debian or Slackware. Other very stable distributions with longer support.

debian is also stable distribution...

What is Life Cycle in Linux?

I'm using Debian for servers, both in the company where I work where they have Java based web applications running, as in private hosting company (partner, not owner ), in combination with ISPConfig. All to great satisfaction.

Kind regards,

Eric

Debian is too big. It is 5 DVD, I think. What is Life Cycle in Linux?

That's for the complete set with all packages. Handy if you don't have internet access. I always use the NETINST CD with is about 150 Mb and allows you to install the BASE of Debian. From there on in you can install whatever package/software you want.

Googling for a good description for Linux Life Cycle gave me this link.

Kind regards,

Eric

I'm planning to setup a Web Server. If you're willing to help me please add me. my id is k_oudom@yahoo.com. Thanks in advance

You've come to the right place here on LinuxQuestions to get help in doing anything with Linux.

But in my opinion it's a better idea to post your questions here in the forum instead of trying to communicate on a private level. If you only communicate with one individual you're 'limited' to his/her knowledge. On the opposite, if you post your questions/problems that you encounter during installation/configuration on this site then you have A LOT of willing souls that will help you out. This way I dare say that ANY problem can get solved.

We're here to help out, so you should just pick a distro, start the install and then take it from there.

You'll just have to keep in mind that all users on LinuxQuestions.org are volunteers and that sometimes you'll have to exercise a bit of patience.

Kind regards,

Eric

Yes I'm respect everyone here. I hope to get help. And willing to help if I have time. I've seen the old server in my company is using Webmin as Web Hosting Control Panel. It is Suse. I want to install a new one. Please help if you can.

You will get help here, of that I'm certain. But you'll have to do the work .

First you'll have to make a choice what distro you will use. Then download an image of that distro and burn it to CD.

Kind regards,

Eric

see
for a many solutions in a CentOS environment.

This is the time before a new version is released.
In the case of Fedora, as it is mainly for testing/development, there is a new version roughly every 6 months.