VLC is the most widely used media player developed by VideoLAN.It can play all the important formats like mp3,MPEG,MPEG2,MPEG4,DivX,QuickTime,WMV,MOV,FLV..and VCDs,DVDs.It is free and Open source so you can install it very easily in your ubuntu 10.04(Lucid Lynx).The features of VLC can also be extended by using some extra audio and video pluging available freely on the internet.
Installing VLC Player in Ubuntu 10.04 LTS
By Using Ubuntu Software Center or Synaptic Package Manager
1. Open SPM(Synaptic Package Manager)(Administration->Synaptic Package Manager) or Ubuntu Software Center(Applications) and Search for vlc player.
2.Check the the box to install and apply(Required in SPM).
3.Downloading and installation will complete within few minutes.
By Using Ubuntu Terminal
1.Open Terminal -Hit CTRL+ALT+T or open it from Applications->Accessories->Terminal.
2.Type the command
sudo apt-get install vlc
3.It may ask you to enter the user password,if so then enter your password then downloading will begin and installation will also finish within moments.
4.Now,I assume you have successfully installed vlc player on Ubuntu 10.04;If any thing goes wrong during this steps let me know through comments.