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Shell Programming and Scripting

To keep only the most recent files

 
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Old 07-26-2007
To keep only the most recent files
Hi all,

I'm running on a Sun Solaris machine. I would only want to keep the last 2 most recent files on 1 of my directory.

Below shows my script, but it is incomplete. For the ?? part I do not know how to continue. please helpSmilie

DIR=/tmp/abc
OUTPUT=/tmp/output.out
OUTPUT1=/tmp/output1.out

cd $DIR
ls -rt | tail -2 > $OUTPUT
ls > $OUTPUT1
cat $OUTPUT1 | while read archive
do
if [ "$archive" = ?? ]; then
echo "Keeping ..."
else
rm $archive
fi
done

Thank you.
 
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LEARN ABOUT X11R4

sccs-comb

sccs-comb(1)							   User Commands						      sccs-comb(1)

NAME

       sccs-comb, comb - combine SCCS deltas

SYNOPSIS

       /usr/ccs/bin/comb [-os] [-csid-list] [-psid] s.filename...

DESCRIPTION

       comb  generates	a  shell script (see sh(1)) that you can use to reconstruct the indicated s.files.  This script is written to the standard
       output.

       If a directory name is used in place of the s.filename argument, the comb command applies to all  s.files  in  that  directory.	Unreadable
       s.files	produce  an  error; processing continues with the next file (if any). The use of `-' as the s.filename argument indicates that the
       names of files are to be read from the standard input, one s.file per line.

       If no options are specified, comb preserves only the most recent (leaf) delta in a branch, and the minimal number of  ancestors	needed	to
       preserve the history.

OPTIONS

       The following options are supported:

       -o	       For each `get -e' generated, access the reconstructed file at the release of the delta to be created. Otherwise, the recon-
		       structed file is accessed at the most recent ancestor. The use of -o may decrease the size of the reconstructed s.file.	It
		       may also alter the shape of the delta tree of the original file.

       -s	       Generate  scripts  to  gather  statistics, rather than combining deltas. When run, the shell scripts report: the file name,
		       size (in blocks) after combining, original size (also in blocks), and the percentage size change, computed by the formula:

		       100 * ( original - combined ) / original

		       This option can be used to calculate the space that will be saved, before actually doing the combining.

       -csid-list      Include the indicated list of deltas.  All other deltas are omitted. sid-list is a comma-separated list of SCCS	delta  IDs
		       (SIDs). To specify a range of deltas, use a `-' separator instead of a comma, between two SIDs in the list.

       -pSID	       The SID of the oldest delta to be preserved.

FILES

       s.COMB		       reconstructed  SCCS file

       comb?????	       temporary file

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWsprot 		   |
       +-----------------------------+-----------------------------+

SEE ALSO

       sccs(1), sccs-admin(1), sccs-cdc(1), sccs-delta(1), sccs-help(1), sccs-prs(1), sccs-prt(1), sccs-rmdel(1), sccs-sccsdiff(1), what(1), sccs-
       file(4), attributes(5)

DIAGNOSTICS

       Use the SCCS help command for explanations (see sccs-help(1)).

BUGS

       comb may rearrange the shape of the tree of deltas.  It may not save any space; in fact, it is possible for the reconstructed file to actu-
       ally be larger than the original.

SunOS 5.10							    1 Nov 1999							      sccs-comb(1)