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Top Forums Shell Programming and Scripting Select older file if multiple file exists with same name Post 302388242 by dashing201 on Tuesday 19th of January 2010 11:14:23 PM
Old 01-20-2010
Select older file if multiple file exists with same name

Hi

I want to select older file if multiple files exist with same name.
eg:There are five files in UNIX folder
  1. Sample1_20091231
  2. Sample1_20100110
  3. Sample1_20100115
  4. Sample2_20100115
  5. Sample3_20100115
However in file list i.e FileName.DAT I have data like
  • Sample1
  • Sample2
  • Sample3
I am using FileName.DAT to read content of FileNames.

If multiple files exist as in this case Sample1 , I want to select older one , i.e. Sample1_20091231

So in this case I want to select Sample1_20091231,Sample2_20100115,Sample3_20100115 and neglect
Sample1_20100110,Sample1_20100115.

How to implement it ?

Any Suggestions.
 

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CUT(1)                                                             User Commands                                                            CUT(1)

NAME
cut - remove sections from each line of files SYNOPSIS
cut OPTION... [FILE]... DESCRIPTION
Print selected parts of lines from each FILE to standard output. With no FILE, or when FILE is -, read standard input. Mandatory arguments to long options are mandatory for short options too. -b, --bytes=LIST select only these bytes -c, --characters=LIST select only these characters -d, --delimiter=DELIM use DELIM instead of TAB for field delimiter -f, --fields=LIST select only these fields; also print any line that contains no delimiter character, unless the -s option is specified -n (ignored) --complement complement the set of selected bytes, characters or fields -s, --only-delimited do not print lines not containing delimiters --output-delimiter=STRING use STRING as the output delimiter the default is to use the input delimiter -z, --zero-terminated line delimiter is NUL, not newline --help display this help and exit --version output version information and exit Use one, and only one of -b, -c or -f. Each LIST is made up of one range, or many ranges separated by commas. Selected input is written in the same order that it is read, and is written exactly once. Each range is one of: N N'th byte, character or field, counted from 1 N- from N'th byte, character or field, to end of line N-M from N'th to M'th (included) byte, character or field -M from first to M'th (included) byte, character or field AUTHOR
Written by David M. Ihnat, David MacKenzie, and Jim Meyering. REPORTING BUGS
GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report cut translation bugs to <http://translationproject.org/team/> COPYRIGHT
Copyright (C) 2017 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
Full documentation at: <http://www.gnu.org/software/coreutils/cut> or available locally via: info '(coreutils) cut invocation' GNU coreutils 8.28 January 2018 CUT(1)
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