I have .mp3 files on my redhat. I double clicked on a file and it started playing music, but no program was launched. I tried to stop the music but couldn't find the application that's playing the file. What's happening.

Maybe it uses mpg123 or something similar to that!!! However, why not use xmms which is a GUI where you can press play, pause, forward, backward, and even stop... Otherwise, run "ps -A" at the prompt to see which application it uses to play your mp3 and "kill" it! taurus

You can find out what program is playing the file with the "lsof" command (LiSt Open Files), eg: $ lsof | grep filename.mp3 You can then kill it by it's PID (Process ID), eg if it was 1234: $ kill 1234 I agree with taurus (as per usual!=o) as in it's probably mpg123 playing it (a command line MP3 player), you can kill all instances of the program with: $ killall mpg123