calculate total used disk space by files older than 180 days using find

Question

I am trying to find the total disk space used by files older than 180 days in a particular directory. This is what I\'m using:

    find . -mtime +180 -exec d         


        

Answer 1

Be careful not to take into account the disk usage by the directories. For example, I have a lot of files in my ~/tmp directory:

$ du -sh ~/tmp
3,7G    /home/rpet/tmp

Running the first part of example posted by devnull to find the files modified in the last 24 hours, we can see that awk will sum the whole disk usage of the ~/tmp directory:

$ find ~/tmp -mtime 0 -exec du -ks {} \; | cut -f1
3849848
84
80

But there is only one file modified in that period of time, with very little disk usage:

$ find ~/tmp -mtime 0
/home/rpet/tmp
/home/rpet/tmp/kk
/home/rpet/tmp/kk/test.png

$ du -sh ~/tmp/kk
84K /home/rpet/tmp/kk

So we need to take into account only the files and exclude the directories:

$ find ~/tmp -type f -mtime 0 -exec du -ks {} \; | cut -f1 | awk '{total=total+$1}END{print total/1024}'
0.078125

You can also specify date ranges using the -newermt parameter. For example:

$ find . -type f -newermt "2014-01-01" ! -newermt "2014-06-01"

See http://www.commandlinefu.com/commands/view/8721/find-files-in-a-date-range