Removing Files Older than a Certain Number of Days

Using the find command, we can remove files that have not been modified in a certain number of days old using the mtime option:

  -mtime n
    File's data was last modified n*24 hours ago.  See the comments for -atime 
    to understand how rounding affects  the  inter‐pretation of file modification times.

To delete files that are older than 6 months, we can use:

  $ find . -type f -mtime +180 | xargs rm

Or alternatively:

  $ find . -type f -mtime +180 -exec rm {} \;