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Full Discussion: finding least out of selected lines
Top Forums Shell Programming and Scripting finding least out of selected lines Post 302552098 by DGPickett on Thursday 1st of September 2011 03:31:20 PM
Old 09-01-2011
Well, use shell or awk, not both.

Code:
sed '
  /^[0-9]* PRO /!d
  s/.* //
 ' your_file |sort -nu | read key5
 
grep "^[0-9]* PRO .* $key5$" your_file

The file name of a list of file names file goes into a variable, that file is made stdin for the rest of the script, each line is read into a line variable, awk is called for that file name to rearrange the fields using tab separators, it is sorted left to right (not numeric, 10 may be less than 9, made unique (sort does that better with a u), fed to a second awk that test the first two fields against saved prior 2 fields, only prints the first for any set of values, with output to a file with same name suffix 20m.
This User Gave Thanks to DGPickett For This Post:
CAch
 

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LEARN ABOUT DEBIAN

dpkg-awk

DPKG-AWK(1)						      General Commands Manual						       DPKG-AWK(1)

NAME

       dpkg-awk - Utility to read a dpkg style db file

SYNOPSIS

       dpkg-awk [(-f|--file) filename] [(-d|--debug) ##] [(-s|--sort) list] [(-rs|--rec_sep) ??] '<fieldname>:<regex>' ... -- <out_fieldname> ..

DESCRIPTION

       dpkg-awk  Parses  a  dpkg status file (or other similarly formatted file) and outputs the resulting records.  It can use regex on the field
       values to limit the returned records, it can also be told which fields to output, and it can sort the matched fields.

OPTIONS

       -f filename
       --file filename
	      The file to parse.  The default is /var/lib/dpkg/status.

       -d [#]
       --debug [#]
	      Each time this is specified, it increased the debug level.

       -s field(s)
       --sort field(s)
	      A space or comma separated list of fields to sort on.

       -n field(s)
       --numeric field(s)
	      A space or comma separated list of fields that should be interpreted as numeric in value.

       -rs ??
       --rec_sep ??
	      Output this string at the end of each output paragraph.

       -h
       --help Display some help.

       fieldname
	      The fields from the file, that are matched with the regex given.	The fieldnames are case insensitive.

       out_fieldname
	      The fields from the file, that are output for each record.  If the first field listed begins with ^, then the list  of  fields  that
	      follows will NOT be output.

BUGS

       Be  warned  that  the author has only a shallow understanding of the dpkg packaging system, so there are probably tons of bugs in this pro-
       gram.

       This program comes with no warranties.  If running this program causes fire and brimstone to rain down upon the earth, you will be on  your
       own.

       This program accesses the dpkg database directly in places, querying for data that cannot be gotten via dpkg.

AUTHOR

       Adam Heath <doogie@debian.org>

DEBIAN
								 Debian Utilities						       DPKG-AWK(1)
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