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Most Puppys have a program called FFConvert in the multimedia menu which will come pre configured for the available tool and enable you to record you're dektop and audio.
↓ put this in you're console to find out if you have avconv or not.
If "avconv" returns a version number then you should use avconv.
↓If not then type in you're console
"Much of the confusion is the result of users not differentiating between the projects, FFmpeg and libav, and their respective command-line tools, ffmpeg and avconv." ...LordNeckbeard from superuser.com.
This article should clear up the confusion about these two tools.
Lobster's video tutorial