mpg123 is an application available in your repositories, so you can install for example in Debian

apt-get install mpg123

This command lets you play mp3 files from the command line quite easy.

Usage

mpg123 [options] file or URL

INPUT OPTIONS -k num, –skip num Skip first num frames. By default the decoding starts at the first frame.

   -n num, --frames num
          Decode  only  num  frames.   By  default  the complete stream is
          decoded.

   -y, --resync
          Do NOT try to resync and continuing decoding if an error  occurs
          in  the  input file. Normally, mpg123 tries to keep the playback
          alive at all costs,  including  skipping  invalid  material  and
          searching  new  header  when  something  goes  wrong.  With this
          switch you can make it bail out  on  data  errors  (and  perhaps
          spare  your  ears  a bad time). Note that this switch may either
          disappear in future or its meaning be revised since it now  does
          the opposite of what it suggests.

   -p URL | none, --proxy URL | none
          The  specified  proxy will be used for HTTP requests.  It should
          be specified as full URL (‘‘http://host.domain:port/’’), but the
          ‘‘http://’’  prefix,  the port number and the trailing slash are
          optional (the default port is 80).  Specifying none means not to
          use  any  proxy, and to retrieve files directly from the respec?
          tive servers.  See also the ‘‘HTTP SUPPORT’’ section.

   -u auth, --auth auth
          HTTP authentication to use when recieving files via  HTTP.   The
          format used is user:password.

   -@ file, --list file
          Read filenames and/or URLs of MPEG audio streams from the speci?
          fied file in addition to the ones specified on the command  line
          (if any).  Note that file can be either an ordinary file, a dash
          ‘‘-’’ to indicate that a list of filenames/URLs is  to  be  read
          from  the standard input, or an URL pointing to a an appropriate
          list file.  Note: only one -@ option can be used (if  more  than
          one is specified, only the last one will be recognized).

   -l n, --listentry n
          Of  the playlist, play specified entry only.  n is the number of
          entry starting at 1. A value of  0  is  the  default  and  means
          playling  the whole list,  a negative value means showing of the
          list of titles with their numbers...

   -z, --shuffle
          Shuffle play.  Randomly shuffles the order of files specified on
          the command line, or in the list file.

   -Z, --random
          Continuous  random  play.   Keeps picking a random file from the
          command line or the play list.  Unlike shuffle play above,  ran?
          dom  play never ends, and plays individual songs more than once.

You can run more than one file just entering more files at the command line, like this:

mpg123 Cinderella\ -\ Gold\ \(Remastered\ 2006\)\ CD1\ 08\ through_the_rain.mp3 Cinderella\ -\ Gold\ \(Remastered\ 2006\)\ CD1\ 09\

The output will be something like this, first the song number 1, and then the second, and third, and so on.

hard_to_find_the_words.mp3
High Performance MPEG 1.0/2.0/2.5 Audio Player for Layers 1, 2 and 3
        version 0.61; written and copyright by Michael Hipp and others
        free software (LGPL/GPL) without any warranty but with best wishes

Playing MPEG stream 1 of 2: Cinderella - Gold (Remastered 2006) CD1 08 through_the_rain.mp3 ...
Note: Xing/Lame/Info header detected

        Title:   Through The Rain
        Artist:  Cinderella
        Album:   Gold (Remastered)
        Year:    2006
        Genre:   Rock

MPEG 1.0 layer III, VBR, 44100 Hz joint-stereo

[5:08] Decoding of Cinderella - Gold (Remastered 2006) CD1 08 through_the_rain.mp3 finished.

Playing MPEG stream 2 of 2: Cinderella - Gold (Remastered 2006) CD1 09 hard_to_find_the_words.mp3 ...
Note: Xing/Lame/Info header detected

        Title:   Hard To Find The Words
        Artist:  Cinderella
        Album:   Gold (Remastered)
        Year:    2006
        Genre:   Rock

MPEG 1.0 layer III, VBR, 44100 Hz joint-stereo