well can any one tell me how to install using repositories ...
Just click on Add/Remove Software, check some boxes, click Apply, whoosh, there you go. Each item that is listed in there can also be downloaded from the command line using yum. -Just open a terminal (Applications > System Tools > Terminal)
- type su - (this will make you root; you can't install stuff without being root)
- type your root password
- start using yum: for example, to install firefox: yum install firefox (which should already be installed so this is just an example); to check for updates: yum check-update; to perform an update: yum update to accept all the updates or yum update package name to update only that specific package.
You can also install Yumex, which is a GUI version of yum. It works like Add/Remove but it is better organized.