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Sort and remove duplicates in directory based on first 5 columns:

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# 1  
Old 01-23-2018
Sort and remove duplicates in directory based on first 5 columns:
I have /tmp dir with filename as:

Code:
010020001_S-FOR-Sort-SYEXC_20160229_2212101.marker
010020001_S-FOR-Sort-SYEXC_20160229_2212102.marker
010020001-S-XOR-Sort-SYEXC_20160229_2212104.marker
010020001-S-XOR-Sort-SYEXC_20160229_2212105.marker
010020001_S-ZOR-Sort-SYEXC_20160229_2212106.marker
010020001-S-FOR-Sort-SYEXC_20160229_2212102.marker

i want to sort these files based on first 5 columns and then remove the duplicates based on those same first 5 columns:

i tried below code:
Code:
ls | sort -k1,2,3,4,5

later on i felt, there is no need to sort my files just remove the duplicates as i need only unique names, order doesn't matter, so i tried this:

Code:
ls | awk -F[_-] '!seen[$1,$2,$3,$4,$5]++'

i got:

Code:
010020001_S-FOR-Sort-SYEXC_20160229_2212101.marker
010020001-S-XOR-Sort-SYEXC_20160229_2212104.marker
010020001_S-ZOR-Sort-SYEXC_20160229_2212106.marker

If you see closely i am missing one file: i.e
Code:
010020001-S-FOR-Sort-SYEXC_20160229_2212102.marker

please note the field separator in first 5 columns.

so my desired output should be :
Code:
010020001_S-FOR-Sort-SYEXC_20160229_2212101.marker
010020001-S-FOR-Sort-SYEXC_20160229_2212102.marker
010020001-S-XOR-Sort-SYEXC_20160229_2212104.marker
010020001_S-ZOR-Sort-SYEXC_20160229_2212106.marker

help me out on this, also i want to run the for loop on the desired result set..so shall i delete the duplicate filenames or store the unique filenames at some other directory and then run for loop, need some kind of advise.

TIA
# 2  
Old 01-23-2018
Sometimes it pays off to follow older threads to their end . Try
Code:
ls *.marker | awk  -F'[_-]' '{T = $0; sub (FS $6 ".*$", "", T)} !seen[T]++'
010020001_S-FOR-Sort-SYEXC_20160229_2212101.marker
010020001-S-FOR-Sort-SYEXC_20160229_2212102.marker
010020001-S-XOR-Sort-SYEXC_20160229_2212104.marker
010020001_S-ZOR-Sort-SYEXC_20160229_2212106.marker

This User Gave Thanks to RudiC For This Post:
rbatte1
# 3  
Old 01-23-2018
thansk RudiCSmilie
# 4  
Old 01-23-2018
Code:
for file in *.marker
do
   base_name="${file//_[0-9][0-9]*_[0-9][0-9]*[.]*/}"
   [[ "$last_base_name" = "$base_name" ]] || echo "$file"
   last_base_name="$base_name"
done

Last edited by rdrtx1; 01-23-2018 at 05:53 PM..
# 5  
Old 02-09-2018
use extension regex option

Code:
ls | sed -E '$!N; /^(.*\.marker)\n\1$/!P; D'

Last edited by abdulbadii; 02-09-2018 at 08:06 PM..
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