topic Re: deletion of files in single stroke in Operating System - HP-UX

deletion of files in single stroke

abhijeet_7 — Fri, 14 Jan 2005 00:53:19 GMT

Hello gurus,
i have a directory wherein system puts thousands of files everyday ..now i have above 5000 files in that directory containing files of 'nov','dec','jan'...
currently we are facing space problem...
so
can anyone tell me how can i delete files of 'nov' & 'dec' in a single stroke ?

i thought of following:
for file in `ls -lrt|grep 'dec'|awk '{print $9}'`
do
rm -fr $file
done

is this correct?

Will find command be of any help? if yes,how?

thanks all,
regards

ABHI k

Re: deletion of files in single stroke

Henk Geurts — Fri, 14 Jan 2005 01:39:06 GMT

hi ABHI

you might want to use the find command:
first see which files you select with:
# find /dirname -mtime +12 -exec ll {} \;

where you select all files modified 12 days ago or more
and display them.

if oke

then use
# find /dirname -mtime +12 -exec rm {} \;

for removal

good luck.
Henk

Re: deletion of files in single stroke

Biswajit Tripathy — Fri, 14 Jan 2005 01:48:09 GMT

If all files are in 1 directory, then:

$ ls -1 | grep "nov|dec" | xargs rm -rf

- Biswajit

Re: deletion of files in single stroke

Biswajit Tripathy — Fri, 14 Jan 2005 02:03:22 GMT

Re: deletion of files in single stroke

abhijeet_7 — Fri, 14 Jan 2005 02:03:39 GMT

Hi Henk,
thanks for the suggestion,
but i don't want to check the access/modify peroid while deleting the these files.

i must delete them,only problem is that the
count is huge( above 5000)...

i must preserve the files for "january"..
but i need to delete "nov" ,"dec" files..

any comments on the 'for' loop?

regards
ABHI K

Re: deletion of files in single stroke

Henk Geurts — Fri, 14 Jan 2005 02:40:44 GMT

ABHI

the loop looks fine but it removes not only

-r--r--r-- 1 root sys 4585 dec 13 23:59 syslog.log.13-dec-04
but also the files of recent date with nov/dec in the name :
-r--r--r-- 1 root sys 963 jan 13 23:59 deco.log.13-jan-05

so be carefull.

regards.

Re: deletion of files in single stroke

Peter Godron — Fri, 14 Jan 2005 02:56:35 GMT

Hi,
the problem with deleting huge number of files only gives a problem if you exceed the max length for the command.
So your approach with a loop is correct as it only deletes one file in each pass.
If you have a certain filename format, wou may want to limit your ls -1 with wildcards.

Re: deletion of files in single stroke

Michael Schulte zur Sur — Fri, 14 Jan 2005 04:13:14 GMT

Hi,

you can avoid deleting files which contain dec in the name with
grep '_dec_'
_ is blank

greetings,

Michael

Re: deletion of files in single stroke

Chris Vail — Fri, 14 Jan 2005 09:55:37 GMT

Have you considered compressing your files as opposed to deleting them?
for FILE in `ls -1 *Nov*`
do
echo $FILE
gzip $FILE
done

Chris

Re: deletion of files in single stroke

Cesare Salvioni — Fri, 14 Jan 2005 10:22:46 GMT

hi,
i too think that find would be the better way.
Anyway if you want a loop in order to choose in some strange way, eg. deleting all files except March and June, I suggest you to avoid building a long argument list as in ur example, instead use a pipeline.

To do that find a command that write on stdout the names you want to delete and pipe this command with:
while read fname; do rm -f $fname; done

for instance

ll | awk '$6 != "Mar" && $6 != "Jun" {print $9}' | while read fname; do rm -f $fname; done

the awk should (check it please) print names of files with date not in March or June, the while loops for all this names using one for every loop and so avoiding the possible problem of having too much args on command line

hope it helps

Re: deletion of files in single stroke

Gordon Morrison — Wed, 19 Jan 2005 09:32:31 GMT

To get around the problem that Henk pointed out, try this:

for file in *-dec-*
do
rm -f $file
done