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# 1  
Old 09-20-2016
Backup files cleanup
Hello,

I've been able to keep a certain number of backup files with the find -mtime command, but is there a way to add the last 4 Sunday's or any other day?

I checked the man page and forums, but couldn't find anything.

Any help would be appreciated.

Thanks
Last edited by rbatte1; 09-20-2016 at 12:26 PM.. Reason: Added ICODE tags
# 2  
Old 09-20-2016
How are your files organised? If there is a difference in the filename to clearly mark a Sunday file, then it should be easy but you would need to explain a little more what files you have first.

Can you show us the output from an ls -l of the files in question that you want to work with?



Thanks,
Robin
# 3  
Old 09-20-2016
Here's the file list:
Code:
Sep 20 00:50 database_backup_201609192130.zip
Sep 19 00:51 database_backup_201609182130.zip
Sep 18 00:49 database_backup_201609172130.zip
Sep 17 00:51 database_backup_201609162130.zip
Sep 16 00:51 database_backup_201609152130.zip

The file name doesn't "clearly" mark the day, just the date.


Moderator's Comments:
Mod Comment
Please wrap all code, files, input & output/errors in CODE tags.
It makes it far easier to read and preserves multiple spaces for indenting and fixed width data.
Last edited by rbatte1; 09-21-2016 at 06:44 AM.. Reason: Added CODE tags
# 4  
Old 09-20-2016
I think rbatte1 was after a clearer explanation of the intended target files' names. Me, I couldn't tell what you're after when reading both your posts.
# 5  
Old 09-20-2016
I agree with RudiC, your input and list of files do not match and not clear .

Quote:
is there a way to add the last 4 Sunday's
Did you mean to list the files ?

Code:
man find ( search for -printf )
%Tk    File's last modification time in the format specified  by
                     k, which is the same as for %A.
a      locale's abbreviated weekday name (Sun..Sat)

Here is the example, i tried to simulate. Hope it helps.

Create the files:
Code:
touch f1 -t 201609180945
touch f2 -t 201609111045
touch f3 -t 201608281230

List files:
Code:
ls -l
-rw-rw-r-- 1 user1 user1    0 Sep 18 09:45 f1
-rw-rw-r-- 1 user1 user1    0 Sep 11 10:45 f2
-rw-rw-r-- 1 user1 user1    0 Aug 28 12:30 f3
-rw-rw-r-- 1 user1 user1    0 Sep 20 22:33 f4

This prints last 2 sunday files
Code:
find . -type f -printf '%Ta\t%p\n' | grep Sun | tail -2

output:
Code:
Sun    ./f2
Sun    ./f1

Change the weekday name and number as per your need.

If this is not what you want, please provide input files , expected output whether you want to list last four sunday based on date information present in filename or 'file modification time' etc.
# 6  
Old 09-21-2016
Ok just to make it clearer.

The backup happens every night.
The file name shows the date.
I have a script that keeps the last 5 files.
I want it to also keep the last 4 Sundays on top of the last 5 files.

Thanks
# 7  
Old 09-21-2016
There's a rich abundance of backup schemes on the net, and even in these fora you might find some that you could adapt to suit your needs.
Looks like you want to save sort of 5 daily backups and another 4 weekly ones?
How about saving the Sundays' backups in a separate directory and keep the latest 4, resp. delete those more than 4 weeks old?
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