[NTLUG:Discuss] disk usage by file age

[Stuart Johnston]

Michael Barnes wrote:
> On Wed, Jun 30, 2010 at 1:26 PM, Stuart Johnston <saj at thecommune.net> wrote:
>> Michael Barnes wrote:
>>> On Wed, Jun 30, 2010 at 12:58 PM, Fred James <fredjame at fredjame.cnc.net>
>>> wrote:
>>>> Michael Barnes wrote:
>>>>> I'm trying to figure out how to gather some disk data.  What I need is
>>>>> to find the disk usage by subfolder, but only by files older than a
>>>>> certain time.  I can get a list of files with
>>>>> find ./ftp/news +mtime 180
>>>>> and get a list of everything older than six months.
>>>>> I can do
>>>>> du -sh ./ftp/news/*
>>>>> and find the usage by subfolder.
>>>>> What I need is to combine the two, so I get something like
>>>>>
>>>>> 15M             ftp/news/4-Dallas
>>>>> 40M             ftp/news/4-Washington
>>>>> 560M    ftp/news/House
>>>>> 1.1G            ftp/news/Senate
>>>>> 717M    ftp/news/White House
>>>>> 69M             ftp/news/YIR 2009
>>>>> 65M             ftp/news/stuff
>>>>>
>>>>> knowing that the size is for files over six months old.
>>>>>
>>>>>
>>>>> Any simple ideas for this?
>>>>>
>>>>> Thanks,
>>>>> Michael
>>>>>
>>>> Michael Barnes
>>>> Have you considered the various 'time' options for 'du' (snip below)?
>>>> Would
>>>> any of those get you closer to what you want?
>>>> You might also consider the '-printf' option (and it's formating options)
>>>> of
>>>> 'find' (under Actions). Hope that helps
>>>> Regards
>>>> Fred James
>>>>
>>>> --time show time of the last modification of any file in the directory,
>>>> or
>>>> any of its subdirectories
>>>>
>>>> --time=WORD
>>>> show time as WORD instead of modification time: atime, access, use, ctime
>>>> or
>>>> status
>>>>
>>>> --time-style=STYLE
>>>> show times using style STYLE: full-iso, long-iso, iso, +FORMAT FORMAT is
>>>> interpreted like ‘date'
>>>>
>>>>
>>> I tried the 'time' options and got
>>> du: unrecognized option `--time'
>>> and they are not listed as options in du --help.
>>> It is an older machine running SLES 9.  Apparently the 'time' options
>>> are new.  I don't know how I would upgrade du for this old SuSE
>>> install.
>> I don't think the time options will do what you want anyway.  Do you have
>> the --files0-from or --exclude-from options?
>>
>>
...
>   -X FILE, --exclude-from=FILE  Exclude files that match any pattern in FILE.

OK.  Construct your find command so that it returns the files you don't 
want and pipe it to 'du -X-' (The last '-' means STDIN).