what is the name for ubuntu 8.04? is tar.gz?

Could you please reframe your question since it's not clear what the question is.

sorry! i would like to know what is the name of it since i am trying to download Adobe Flash Player and is asking me what version of linux do i have: rpm, YUM, tar.gz

Have a look at the download page: http://www.ubuntu.com/getubuntu/download
Release information: http://www.ubuntu.com/getubuntu/releasenotes/804
Concerning the name: https://wiki.ubuntu.com/HardyHeron

You can use the tar.gz format.

Please read the page below and maybe you need to enable the multiverse repository in Synaptic to get access to the package.

https://help.ubuntu.com/community/MultimediaApplications#Flash%20Player%209%20plugin%20installation

Ah yeah and if you wanna install packets with ease you may want to try .deb files and load them in your APT Packet Installer maybe. It checks all the dependencies. If I were you I'd rather stay away from software packed in .gz archives. It's actually a bit more complicated to keep your system clean with this since I'm sure you're not that high level. ;-)

Unfortunately I do not have the powers to change the state of this question to SOLVED, EXPIRED or INVALID. Someone here at Launchpad either grant me that permission or simply apply the change in state to this question, please.