how to find unique lines in bash

Hi experts,

Sample file sample.txt
ny,co,ci,nj,oh
ny,co,nj,ci,oh
ny,co,ci,oh
ny,co,ci,nj

would like to get unique lines in bash, pls note..1st and 2nd lines are actually same content but values are swapped.
but would like to find and get below output. Is it possible to achieve in few lines pls?

output
ny,co,ci,nj,oh
ny,co,ci,oh
ny,co,ci,nj

Thanks in advance
enthuguyAsked:
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ozoCommented:
#!/bin/bash                                          
perl -F, -ane 'print if !$u{join",",sort @F}++' < sample.txt
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ozoCommented:
#!/bin/bash
while read line ; do
  u=`echo "${line//,/
}" | sort`
  v=unique_$$_${u//
/_}
    [ ${!v} ] || echo $line
  declare $v=1
done < sample.txt
0
enthuguyAuthor Commented:
Thanks very much!
0
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