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Top Forums UNIX for Dummies Questions & Answers Sorting files based on timestamp and picking the latest file Post 302642011 by robertbrown624 on Thursday 17th of May 2012 01:59:30 AM
Old 05-17-2012
Sorting files based on timestamp and picking the latest file

Hi Friends,
Newbie to shell scripting
Currently i have used the below to sort data based on filenames and datestamp
Code:
$ printf '%s\n' *.dat* | sort -t. -k3,4
filename_1.dat.20120430.Z
filename_2.dat.20120430.Z
filename_3.dat.20120430.Z
filename_1.dat.20120501.Z
filename_2.dat.20120501.Z
filename_3.dat.20120501.Z
filename_1.dat.20120502.Z
filename_2.dat.20120502.Z
filename_3.dat.20120502.Z
filename_1.dat.20120627.Z
filename_2.dat.20120627.Z
filename_3.dat.20120627.Z
filename_1.dat.20120730.Z
filename_2.dat.20120730.Z
filename_3.dat.20120730.Z

Now i want to delete files with older date and keep 4 latest files available in the filename(no system timestamp here)
So my result should be like
Code:
filename_1.dat.20120501.Z
filename_2.dat.20120501.Z
filename_3.dat.20120501.Z
filename_1.dat.20120502.Z
filename_2.dat.20120502.Z
filename_3.dat.20120502.Z
filename_1.dat.20120627.Z
filename_2.dat.20120627.Z
filename_3.dat.20120627.Z
filename_1.dat.20120730.Z
filename_2.dat.20120730.Z
filename_3.dat.20120730.Z

Please help me in resolving or any other script.

Moderator's Comments:
Mod Comment Please use code tags for blocks of data


---------- Post updated 05-17-12 at 01:59 AM ---------- Previous update was 05-16-12 at 10:40 PM ----------

Hi all,
Need your help in fixing the issue....

Last edited by jim mcnamara; 05-17-2012 at 12:49 AM..
 

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UNKNOWN(1)						      General Commands Manual							UNKNOWN(1)

NAME
unknown - identify possible genotypes for unknowns SYNOPSIS
A program to rapidly identify which genotypes are possible for individuals typed as unknowns in the input pedigree. unknown [ -cl ] DESCRIPTION
unknown infers possible genotypes and mating combinations for parents with unknown genotypes for ilink(1), mlink(1) and linkmap(1). OPTIONS
-c Use conditional allele frequencies. -l Choose a good set of loop breakers automatically. RETURN VALUE
0 Successful completion ERRORS
10 File not found 255 Failure EXAMPLES
Normally, unknown(1) is run immediately prior to its sister programs, ilink(1), mlink(1) and linkmap(1), like this: unknown mlink FILES
unknown(1) reads the two files pedfile.dat and datafile.dat as its own input and produces various temporary files that are used as input to the next program. These temporary files are ipedfile.dat, upedfile.dat, speedfile.dat and newspeedfile.dat. NOTES
unknown(1) is part of the FASTLINK package, which is a re-implementation of the LINKAGE suite of computer tools that help investigate genetic linkage as first proposed G.M. Lathrop, J.M. Lalouel, C. Julier, and J. Ott. AUTHORS
Dylan Cooper, Alejandro Schaffer, and Tony Schurtz based on work originally by Jurg Ott, Ph.D, et. al. This manual page was written by Elizabeth Barham <lizzy@soggytrousers.net> for the Debian GNU/Linux system (but may be used by others). WORD-WIDE-WEB http://www.ncbi.nlm.nih.gov/CBBResearch/Schaffer/fastlink.html SEE ALSO
ilink(1), linkmap(1), lodscore(1), mlink(1). April 15, 2003 UNKNOWN(1)
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