hi...i am new to linux and jst want to know will i start from redhat linux os or from fedora os and tell me also which version to choose.

Thanks...

Fedora and RH do not differ too much. Fedora is a RH supported project and usually teams as a test bed for RH. Which distribution to use is a very personal choice. And it depends on the purpose as well. If you are looking at starting to learn and use linux on your desktop for day to day activities, fedora is okay. But it should be avoided at all costs on your production servers. It is more bleeding edge, can have major version updates and upgrades and is prone to breakage. As for RH, it has very definitive policy on version updates. You can be sure of the stability it provides. Cent OS is a free version created from the RH sources. Ubuntu is another very popular desktop distribution. But I have slowly started to lose faith in its stability.
To sum up, download the different distributions, use them and get familiar and keep the one you feel comfortable with. And if you are aiming at RH certifications, Cent OS is better choice.

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Thanks for the reply...
Please specify the centos which version to use.

It is always recommended to use the newest version, unless you have a specific reason to use older versions.

And the current one is Cent OS 6.

Thanks downloading centos 6.2 and hopefully it works on vmware efficiently.....

It depends what version of vmware you are using. If its a VMWare server running on a server grade machine, you should have a good performance. But if you are installing it inside a VM Player running on some desktop or laptop hardware, do not expect great performance.

Where did you get that? Any OS running in a VM on a decent desktop or laptop will have a good performance. A today very common Core i5 or Phenom II is not server grade hardware, but will give you good performance with VMware Player, Qemu-KVM or Virtualbox (can't say about other virtualization solutions, have not tried them). Even the Athlon QL-66 in my laptop performs good when you have not a really heavy OS/DE in the VM.

chaitanya,
I'm having a machine of dual core processor, I use VM on that linux installed and it gives good enough performance.

puneetv,
The choice is good CentOS 6.2 and it's EOL is also till 30th Nov 2020.

It never hurts to reveal some information about the hardware you are using. Brand and type of computer you are using, for instance. If you know the motherboard, video card, memory, etc., that is even better. Some people put it in their signatures to avoid having to keep typing it out. Hope you like Linux.

bg

Good and good enough are not very definitive terms and are bound to change from user to user. Good enough performance for you might not be good enough for me. But it would definitely not be as good as a native installation. And I am experiencing the lag in core i3 windows 7 64 bit with 4 gig RAM.