One of the first issues to deal with is which tools you will use for the task of installation. The answer to this question will depend on what distribution you are using. Here is a sample breakdown of the tools used, in various distributions, for installation:
- SuSE: YaST, rpm
- Ubuntu: Synaptic, apt-get
- Mandriva: Drakinstall, urpmi
- Fedora: Yumex, yum, rpm
Although not a complete listing of applications, you get the idea. The nice thing about how modern Linux distributions are designed is that you don't generally need to know the name of the tool you are using for this purpose. Typically, within the main menu, you will see an entry called Add/Remove Software, or Application Installation (or some variation of either). One universal for all of the above tools (and any Linux installation tool) is you will need either root or sudo permissions to take any action.