Mplayer music playback with playlist

the command to use:

$ mplayer -playlist playlist.txt 

to make a playlist:

1. go to the directory that contains the files you want to make a playlist of.

2.

$ find . -type f -name "*.mp3" | sort > directory_playlist.txt

3. edit txt file so it has the full path (not necessary)

to do the same with a one-line command (if you do not need to edit the playlist):

$ mplayer -playlist <(find /directory/of/your/music/ -name "*.mp3" -type f | sort)

hit enter for the next track

cit crtl+c to break playback

A couple of useful commands with or within mplayer:
-shuffle : shuffle playlist
-loop : play the playlist repeatedly (can be combined with -loop)