For example here, if I wanted to delete all MP3's from March 19, 2016, I just need to use the command below:
rm -f /var/spool/asterisk/monitorDONE/MP3/20160319*.mp3It would be helpful in freeing up space if the original .WAV files are also deleted since they eat up a lot of space. This isn't a date-specific command since we only need the MP3's.
rm -f /var/spool/asterisk/monitorDONE/ORIG/*.wav
To free up more space, check here:
http://simplevicidial.blogspot.com/2016/04/no-mysqlsock-because-root-partition-is.html
*Another thing I learned: Sometimes, you just need to reboot to free up space.