Ubuntu 12.04 LTS Tested
Linux ls sort by date modified
ls -t
Linux ls only directories sort directory verbose
ls /path/to/directory/* -d -l
Linux find and delete files older than X days
find /path/to/files* -mtime +5 -exec rm {} \;
ls -t
ls /path/to/directory/* -d -l
find /path/to/files* -mtime +5 -exec rm {} \;