removing file

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# 1  
Old 02-11-2002
removing file

Hi All

Can u tell me how to delete files (on unix)which is
exactly one month old or for that matter of a
particular date.
# 2  
Old 02-11-2002

I think u should find the files using find with an option of +mtime ( or +atime ) and use rm command on its output.

Check the man pages of find and this is available with examples.
# 3  
Old 02-12-2002
is there any speed difference between the two ? also do both rcp or ftp use the same type of protocol ??
# 4  
Old 02-12-2002
There is no speed difference - the difference is in the 'time' of the file. -atime will give the files accessed n days ago while -ctime gives you files in which the status was changed n days ago.

Experiment with the files you are looking at -
% find ./ -name "*" -atime 20 -ls
or % find ./ -name "*" -ctime 20 -ls

Once you get the numbers and files correct in your list, then
use something like the following
find ./ -name "*" -atime 30 -exec rm {} \;
(it is very important you get the last part correct since unknown errors could occur ) Also realize if you are dealing with removing a month's worth of files, this does it by days, you want to be careful of short months (such as this month).
# 5  
Old 02-12-2002

Maybe its just me, but this looks a lot like a homework question.

If this is homework, please do a "man" on the find command. Or get a copy of the "Unix in a Nutshell" by O'Reilly.
# 6  
Old 02-12-2002
CPU & Memory Alternative and a little info


find . /a/b/c/log -name \*.log -mtime +10 | xargs rm

use mtime which is time last modified. if you use atime it means accessed. if someone looks at the file every day it will
never be deleted.

| xargs is more efficient because it does the action once on all files found vs. exec()ing an rm for each file.

you need to quote the * with ' or \ because the shell will expand the star to mean all files in . when in " type quotes.

Also take a look at the program below as a solution:

@list2delete = `find /a/b/c/log -name \*.log -mtime +20 `;

$total = @list2delete;
if ($total !=0)
  foreach $i (@list2delete)
    chomp $i;
    print "DELETING: $i\n";
    unlink $i;
  print "$total files were removed\n";
  print "No Files to delete\n";


added code tags for readability --oombera

Last edited by oombera; 02-20-2004 at 02:32 PM..
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