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Full Discussion: Shell Script to Delete 1 folder and keep 5
Top Forums UNIX for Dummies Questions & Answers Shell Script to Delete 1 folder and keep 5 Post 302429526 by greendevil on Tuesday 15th of June 2010 04:21:05 PM
Old 06-15-2010
---------- Post updated 06-15-10 at 12:14 PM ---------- Previous update was 06-14-10 at 04:20 PM ----------

Actually- there is an issue with this. The way in which the backup folders are created are like the following;

Code:
2010-6-9/   2010-6-10/   2010-6-11/

The '6' in this was easily fixed by simply removing the {2} that was after it. (the only issue that results from this is what to do starting in October, but I will just create a second script when that time comes)

What to do with the '9' and then '10' . I've tried various expressions and wildcards, but cannot seem to get it to work. I have a test directory setup with directories just as above. It seems that whatever I try, the directories that echo as the 'last on the list' are 6-10 & 6-11, rather than 6-9 & 6-10.

thanks in advance.

---------- Post updated at 03:21 PM ---------- Previous update was at 12:14 PM ----------

I've actually have changed the list command to the following and it works. However, because of the digit placement of the 9 and the 10, the 9 is seen as the first digit, which messes up the sort command. This is an issue that I will need to resolve elsewhere.

My change;
Code:
ls . | grep -E '[0-9]{4}-[0-9]-[0-9]{0,}' >> BUFFER

Last edited by Scott; 06-15-2010 at 08:27 PM.. Reason: Code tags, please...
 

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LEARN ABOUT CENTOS

truncate

TRUNCATE(1)							   User Commands						       TRUNCATE(1)

NAME

       truncate - shrink or extend the size of a file to the specified size

SYNOPSIS

       truncate OPTION... FILE...

DESCRIPTION

       Shrink or extend the size of each FILE to the specified size

       A FILE argument that does not exist is created.

       If  a  FILE  is	larger than the specified size, the extra data is lost.  If a FILE is shorter, it is extended and the extended part (hole)
       reads as zero bytes.

       Mandatory arguments to long options are mandatory for short options too.

       -c, --no-create
	      do not create any files

       -o, --io-blocks
	      treat SIZE as number of IO blocks instead of bytes

       -r, --reference=RFILE
	      base size on RFILE

       -s, --size=SIZE
	      set or adjust the file size by SIZE bytes

       --help display this help and exit

       --version
	      output version information and exit

       SIZE is an integer and optional unit (example: 10M is 10*1024*1024).  Units are K, M, G, T, P, E, Z, Y (powers of  1024)  or  KB,  MB,  ...
       (powers of 1000).

       SIZE  may also be prefixed by one of the following modifying characters: '+' extend by, '-' reduce by, '<' at most, '>' at least, '/' round
       down to multiple of, '%' round up to multiple of.

       GNU  coreutils  online  help:  <http://www.gnu.org/software/coreutils/>	Report	truncate  translation  bugs   to   <http://translationpro-
       ject.org/team/>

AUTHOR

       Written by Padraig Brady.

COPYRIGHT

       Copyright (C) 2013 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       dd(1), truncate(2), ftruncate(2)

       The  full  documentation  for truncate is maintained as a Texinfo manual.  If the info and truncate programs are properly installed at your
       site, the command

	      info coreutils 'truncate invocation'

       should give you access to the complete manual.

GNU coreutils 8.22						     June 2014							       TRUNCATE(1)
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