Guys , i'm new at linux and i just installed linux(Red Hat) few days , but i was wondering what is the differences between all these different dirtros , Red hat, Sues,Slakware ...etc , would someone please tell me what is diffeerence between all Distos .Thanks in advance

They have different choice of packets, different installation program, different configuration utilities and are differently configured. But in fact the differences aren't big.

It's like cereal, they are all pretty much either corn based or wheat based, but there is alot of things added and they are prepared differently.

Which flavor each person prefers is up to the user. There is no problem in trying out all the diff distros to see which one suits your needs, but that can be time/bandwidth or money consuming. Think of what you are looking for in an OS and what you plan on using it for. Then when you have a good idea, either post it on here, or search the websites of the distros and read about the options.

If you are just coming to Linux you might want to look more towards Redhat, Mandrake, WinLinux, Lindows, or Debian to start out with. Redhat and Mandrake I know provide a wide variety of tools to help the new user become familiar with Linux. Plus, be ready to read quite a bit. When you get stuck, there is usually a "man" or manual with tons of documentation on whatever it is you are having problems with. Best of all, everything is FREE!!! Unless you like a distro and decide to buy their commercial version which will include even more apps and support! Usually at a decent priced compared to other *BLOATED* OS's.

Mandrake & RedHat are moderately good for all the users, whether at home or at office.
some guys at parallel computing and all that, prefer slackware. debian has good reputation among nerds. Winlinux is good for first time installers-users of linux.
But there is no real deep difference as you can always add other tools on your choice of distribution. and mostly all the distribution will support installation of any other tools included in other distributions, apart from some minor changes, if required.