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Full Discussion: Help on grep syntax in UNIX
Top Forums Shell Programming and Scripting Help on grep syntax in UNIX Post 303008229 by Don Cragun on Wednesday 29th of November 2017 06:33:46 AM
Old 11-29-2017
Since many versions of awk do not include a sorting function and you seem to want sorted output (although it isn't clear if you want unique sorted output or just need sort to get unique output), you might try a simpler pipeline:
Code:
BL_LAYER=`ls *session*log | cut -d'.' -f1  | sort -u | paste -s -d, -`
echo "Business Layer are :- $BL_LAYER"

If the cut in this pipeline is just getting rid of .log at the end of your filenames, the sort -u can be removed from the pipeline and you'll still get the same results.

Note that the above pipeline uses a comma as the separator between filenames instead of the <tab> used as the default by paste. If you want the delimiter to be <comma><space> sometimes and just <comma> sometimes (as in your latest ";i'expected output to print[/i]"), you'll need to find another way to do that. (The paste utility only uses single characters as field delimiters, and you'll need to very clearly define the conditions under which each of the various delimiters you want to use are supposed to be chosen as the delimiter between output filenames!)
 

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SORT(1) 						      General Commands Manual							   SORT(1)

NAME
sort - sort a file of ASCII lines SYNOPSIS
sort [-bcdfimnru] [-tc] [-o name] [+pos1] [-pos2] file ... OPTIONS
-b Skip leading blanks when making comparisons -c Check to see if a file is sorted -d Dictionary order: ignore punctuation -f Fold upper case onto lower case -i Ignore nonASCII characters -m Merge presorted files -n Numeric sort order -o Next argument is output file -r Reverse the sort order -t Following character is field separator -u Unique mode (delete duplicate lines) EXAMPLES
sort -nr file # Sort keys numerically, reversed sort +2 -4 file # Sort using fields 2 and 3 as key sort +2 -t: -o out # Field separator is : sort +.3 -.6 # Characters 3 through 5 form the key DESCRIPTION
Sort sorts one or more files. If no files are specified, stdin is sorted. Output is written on standard output, unless -o is specified. The options +pos1 -pos2 use only fields pos1 up to but not including pos2 as the sort key, where a field is a string of characters delim- ited by spaces and tabs, unless a different field delimiter is specified with -t. Both pos1 and pos2 have the form m.n where m tells the number of fields and n tells the number of characters. Either m or n may be omitted. SEE ALSO
comm(1), grep(1), uniq(1). SORT(1)
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